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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/ThreadLocal.h:50:0,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/SingletonThreadLocal.h:24,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/Random.cpp:26:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/SharedMutex.cpp:17:0:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/Synchronized.h:32:0,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/Singleton.h:128,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/Singleton.cpp:17:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/Singleton.h:136:0,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/Singleton.cpp:17:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/synchronization/CallOnce.h:25:0,
                 from /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/detail/MemoryIdler.cpp:28:
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/SharedMutex.h:1547:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/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/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/SharedMutex.h:1548:23:   required from here
/home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d/source_subfolder/folly/SharedMutex.h:1332:25: warning: ‘__warn_unused_result__’ attribute only applies to function types [-Wattributes]
   class FOLLY_NODISCARD ReadHolder {
                         ^~~~~~~~~~
g++: internal compiler error: Terminated (program cc1plus)
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-6/README.Bugs> for instructions.
make[2]: *** [source_subfolder/CMakeFiles/folly_base.dir/folly/detail/ThreadLocalDetail.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-6/README.Bugs> for instructions.
make[2]: *** [source_subfolder/CMakeFiles/folly_base.dir/folly/detail/UniqueInstance.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-6/README.Bugs> for instructions.
make[2]: *** [source_subfolder/CMakeFiles/folly_base.dir/folly/executors/CPUThreadPoolExecutor.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 'b3d60227f2b41b99cee3c81d1caeef524c94a08d' build failed
folly/2019.10.21.00: WARN: Build folder /home/conan/w/cci_PR-3711/.conan/data/folly/2019.10.21.00/_/_/build/b3d60227f2b41b99cee3c81d1caeef524c94a08d
ERROR: Exiting with code: 5