CMake Warning:
  Manually-specified variables were not used by the project:

    CMAKE_EXPORT_NO_PACKAGE_REGISTRY


In file included from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/ThreadLocal.h:50:0,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SingletonThreadLocal.h:24,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/Random.cpp:26:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::WriteHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1444:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::UpgradeHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1394:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradeHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::ReadHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1332:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::WriteHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1444:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::UpgradeHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1394:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradeHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::ReadHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1332:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder {
                         ^
In file included from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.cpp:17:0:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::WriteHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1444:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::UpgradeHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1394:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradeHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::ReadHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1332:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::WriteHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1444:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::UpgradeHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1394:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradeHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::ReadHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1332:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder {
                         ^
In file included from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/Synchronized.h:32:0,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/Singleton.h:128,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/Singleton.cpp:17:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::WriteHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1444:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::UpgradeHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1394:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradeHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::ReadHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1332:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::WriteHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1444:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::UpgradeHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1394:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradeHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::ReadHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1332:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder {
                         ^
In file included from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/Singleton.h:136:0,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/Singleton.cpp:17:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/synchronization/RWSpinLock.h:311:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder;
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/synchronization/RWSpinLock.h:312:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradedHolder;
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/synchronization/RWSpinLock.h:313:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder;
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/synchronization/RWSpinLock.h:315:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/synchronization/RWSpinLock.h:384:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradedHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/synchronization/RWSpinLock.h:447:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder {
                         ^
In file included from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/synchronization/CallOnce.h:25:0,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/detail/MemoryIdler.cpp:28:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::WriteHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1444:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::UpgradeHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1394:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradeHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::ReadHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1332:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::WriteHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1444:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::UpgradeHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1394:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradeHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::ReadHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1332:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder {
                         ^
In file included from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/executors/ThreadPoolExecutor.h:25:0,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/executors/CPUThreadPoolExecutor.h:19,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/executors/CPUThreadPoolExecutor.cpp:17:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::WriteHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1444:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::UpgradeHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1394:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradeHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::ReadHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1332:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::WriteHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1444:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::UpgradeHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1394:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradeHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::ReadHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1332:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder {
                         ^
In file included from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/detail/ThreadLocalDetail.h:33:0,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/detail/ThreadLocalDetail.cpp:17:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::WriteHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1444:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::UpgradeHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1394:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradeHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::ReadHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1332:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::WriteHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1444:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::UpgradeHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1394:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradeHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::ReadHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1332:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder {
                         ^
In file included from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/executors/ThreadPoolExecutor.h:25:0,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/executors/EDFThreadPoolExecutor.h:25,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/executors/EDFThreadPoolExecutor.cpp:30:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::WriteHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1444:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::UpgradeHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1394:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradeHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::ReadHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1332:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::WriteHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1444:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::UpgradeHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1394:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradeHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::ReadHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1332:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder {
                         ^
In file included from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/executors/GlobalExecutor.cpp:21:0:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::WriteHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1444:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::UpgradeHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1394:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradeHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::ReadHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1332:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::WriteHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1444:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::UpgradeHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1394:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradeHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::ReadHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1332:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder {
                         ^
In file included from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/Singleton.h:136:0,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/executors/GlobalExecutor.cpp:22:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/synchronization/RWSpinLock.h:311:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder;
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/synchronization/RWSpinLock.h:312:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradedHolder;
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/synchronization/RWSpinLock.h:313:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder;
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/synchronization/RWSpinLock.h:315:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/synchronization/RWSpinLock.h:384:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradedHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/synchronization/RWSpinLock.h:447:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder {
                         ^
In file included from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/io/async/DelayedDestruction.h:19:0,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/io/async/HHWheelTimer.h:21,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/io/async/EventBase.h:47,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/io/async/EventBaseManager.h:23,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/executors/IOThreadPoolExecutor.h:23,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/executors/GlobalExecutor.cpp:24:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/io/async/DelayedDestructionBase.h:63:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD DestructorGuard {
                         ^
In file included from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/Synchronized.h:32:0,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/executors/GlobalThreadPoolList.h:24,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/executors/GlobalThreadPoolList.cpp:17:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::WriteHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1444:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::UpgradeHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1394:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradeHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::ReadHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1332:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::WriteHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1444:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::UpgradeHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1394:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradeHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::ReadHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1332:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder {
                         ^
In file included from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/executors/ThreadPoolExecutor.h:25:0,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/executors/IOThreadPoolExecutor.h:22,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/executors/IOThreadPoolExecutor.cpp:17:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::WriteHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1444:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::UpgradeHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1394:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradeHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::ReadHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1332:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::WriteHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1444:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::UpgradeHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1394:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradeHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::ReadHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1332:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder {
                         ^
In file included from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/io/async/DelayedDestruction.h:19:0,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/io/async/HHWheelTimer.h:21,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/io/async/EventBase.h:47,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/io/async/EventBaseManager.h:23,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/executors/IOThreadPoolExecutor.h:23,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/executors/IOThreadPoolExecutor.cpp:17:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/io/async/DelayedDestructionBase.h:63:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD DestructorGuard {
                         ^
In file included from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/ThreadLocal.h:50:0,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/executors/QueuedImmediateExecutor.h:22,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/executors/QueuedImmediateExecutor.cpp:17:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::WriteHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1444:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::UpgradeHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1394:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradeHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::ReadHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1332:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::WriteHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1444:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::UpgradeHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1394:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradeHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::ReadHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1332:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder {
                         ^
In file included from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/ThreadLocal.h:50:0,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SingletonThreadLocal.h:24,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/synchronization/HazptrThrLocal.h:26,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/synchronization/HazptrDomain.h:22,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/synchronization/Hazptr.h:20,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/concurrency/UnboundedQueue.h:30,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/executors/SerialExecutor.h:23,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/executors/SerialExecutor.cpp:17:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::WriteHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1444:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::UpgradeHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1394:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradeHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::ReadHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1332:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::WriteHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1444:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::UpgradeHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1394:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradeHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::ReadHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1332:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder {
                         ^
In file included from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/executors/ThreadPoolExecutor.h:25:0,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/executors/ThreadPoolExecutor.cpp:17:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::WriteHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1444:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::UpgradeHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1394:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradeHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::ReadHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1332:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::WriteHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1444:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::UpgradeHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1394:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradeHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::ReadHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1332:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder {
                         ^
In file included from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/ThreadLocal.h:50:0,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SingletonThreadLocal.h:24,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/synchronization/HazptrThrLocal.h:26,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/synchronization/HazptrDomain.h:22,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/synchronization/Hazptr.h:20,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/concurrency/UnboundedQueue.h:30,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/executors/TimedDrivableExecutor.h:21,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/executors/TimedDrivableExecutor.cpp:17:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::WriteHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1444:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::UpgradeHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1394:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradeHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::ReadHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1332:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::WriteHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1444:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::UpgradeHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1394:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradeHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::ReadHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1332:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder {
                         ^
In file included from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/ThreadLocal.h:50:0,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/experimental/TLRefCount.h:19,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/experimental/ReadMostlySharedPtr.h:22,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/experimental/AtomicReadMostlyMainPtr.h:25,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/experimental/AtomicReadMostlyMainPtr.cpp:17:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::WriteHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1444:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::UpgradeHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1394:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradeHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::ReadHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1332:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::WriteHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1444:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::UpgradeHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1394:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradeHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::ReadHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1332:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder {
                         ^
In file included from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/ThreadLocal.h:50:0,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SingletonThreadLocal.h:24,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/synchronization/HazptrThrLocal.h:26,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/synchronization/HazptrDomain.h:22,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/synchronization/Hazptr.h:20,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/concurrency/UnboundedQueue.h:30,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/executors/TimedDrivableExecutor.h:21,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/futures/Future.h:34,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/executors/TimekeeperScheduledExecutor.h:23,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/executors/TimekeeperScheduledExecutor.cpp:17:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::WriteHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1444:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::UpgradeHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1394:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradeHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<true>::ReadHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1332:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::WriteHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1444:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD WriteHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::UpgradeHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1394:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD UpgradeHolder {
                         ^
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h: In instantiation of ‘class folly::SharedMutexImpl<false>::ReadHolder’:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/SharedMutex.h:1332:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder {
                         ^
In file included from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/io/async/DelayedDestruction.h:19:0,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/io/async/HHWheelTimer.h:21,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/fibers/Baton.h:23,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/futures/Future-inl.h:35,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/futures/Future.h:2614,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/executors/TimekeeperScheduledExecutor.h:23,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/executors/TimekeeperScheduledExecutor.cpp:17:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91/source_subfolder/folly/io/async/DelayedDestructionBase.h:63:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD DestructorGuard {
                         ^
g++: internal compiler error: Terminated (program cc1plus)
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-5/README.Bugs> for instructions.
make[2]: *** [source_subfolder/CMakeFiles/folly_base.dir/folly/experimental/DynamicParser.cpp.o] Error 4
make[2]: *** Waiting for unfinished jobs....
g++: internal compiler error: Terminated (program cc1plus)
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-5/README.Bugs> for instructions.
make[2]: *** [source_subfolder/CMakeFiles/folly_base.dir/folly/experimental/FunctionScheduler.cpp.o] Error 4
g++: internal compiler error: Terminated (program cc1plus)
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-5/README.Bugs> for instructions.
make[2]: *** [source_subfolder/CMakeFiles/folly_base.dir/folly/executors/TimekeeperScheduledExecutor.cpp.o] Error 4
make[1]: *** [source_subfolder/CMakeFiles/folly_base.dir/all] Error 2
make: *** [all] Error 2
WARN: libevent/2.1.12: requirement openssl/1.1.1g overridden by folly/2019.10.21.00 to openssl/1.1.1h 
folly/2019.10.21.00: ERROR: Package '4b5c31b20f8329d4065648911aca77dd21ddcb91' build failed
folly/2019.10.21.00: WARN: Build folder /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/4b5c31b20f8329d4065648911aca77dd21ddcb91
ERROR: Exiting with code: 5