******************************************************************************** conan test cci-e698f262/recipes/stella-cv-fbow/all/test_package/conanfile.py stella-cv-fbow/cci.20240107@#47c59d005539e14d3ccd972b502b4b5f -pr /Users/jenkins/workspace/prod-v1/bsr/38838/cebeb/profile_osx_130_libcpp_apple-clang_release_armv8.stella-cv-fbow-shared-False.txt -c tools.system.package_manager:mode=install -c tools.system.package_manager:sudo=True -c tools.apple:sdk_path=/Applications/conan/xcode/13.0/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.3.sdk ******************************************************************************** Configuration: [settings] arch=armv8 build_type=Release compiler=apple-clang compiler.libcxx=libc++ compiler.version=13.0 os=Macos [options] stella-cv-fbow:shared=False [build_requires] [env] [conf] tools.system.package_manager:mode=install tools.system.package_manager:sudo=True tools.apple:sdk_path=/Applications/conan/xcode/13.0/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.3.sdk Version ranges solved Version range '>=1.2.11 <2' required by 'opencv/4.9.0' resolved to 'zlib/1.3.1' in local cache Version range '>=1.6 <2' required by 'opencv/4.9.0' resolved to 'libpng/1.6.43' in local cache Version range '>=1.2.11 <2' required by 'protobuf/3.21.12' valid for downstream requirement 'zlib/1.3.1' Version range '>=1.2.11 <2' required by 'libpng/1.6.43' valid for downstream requirement 'zlib/1.3.1' Version range '>=1.2.11 <2' required by 'openexr/3.2.3' valid for downstream requirement 'zlib/1.3.1' Version range '>=1.2.11 <2' required by 'libtiff/4.6.0' valid for downstream requirement 'zlib/1.3.1' Version range '>=1.2.11 <2' required by 'ffmpeg/4.4.4' valid for downstream requirement 'zlib/1.3.1' Version range '>=1.1 <4' required by 'ffmpeg/4.4.4' resolved to 'openssl/3.2.1' in local cache Version range '>=1.6 <2' required by 'freetype/2.13.2' valid for downstream requirement 'libpng/1.6.43' Version range '>=1.2.10 <2' required by 'freetype/2.13.2' valid for downstream requirement 'zlib/1.3.1' Version range '>=1.2.11 <2' required by 'openssl/3.2.1' valid for downstream requirement 'zlib/1.3.1' stella-cv-fbow/cci.20240107 (test package): Installing package Requirements ade/0.1.2d from 'conan-center' - Cache brotli/1.1.0 from 'conan-center' - Cache bzip2/1.0.8 from 'conan-center' - Cache dav1d/1.2.1 from 'conan-center' - Cache eigen/3.4.0 from 'conan-center' - Cache ffmpeg/4.4.4 from 'conan-center' - Cache freetype/2.13.2 from 'conan-center' - Cache imath/3.1.9 from 'conan-center' - Cache jasper/4.2.0 from 'conan-center' - Cache jbig/20160605 from 'conan-center' - Cache libaom-av1/3.6.1 from 'conan-center' - Cache libdeflate/1.19 from 'conan-center' - Cache libfdk_aac/2.0.3 from 'conan-center' - Cache libiconv/1.17 from 'conan-center' - Cache libjpeg/9e from 'conan-center' - Cache libmp3lame/3.100 from 'conan-center' - Cache libpng/1.6.43 from 'conan-center' - Cache libtiff/4.6.0 from 'conan-center' - Cache libvpx/1.13.1 from 'conan-center' - Cache libwebp/1.3.2 from 'conan-center' - Cache libx264/cci.20220602 from 'conan-center' - Cache libx265/3.4 from 'conan-center' - Cache llvm-openmp/17.0.6 from 'conan-center' - Cache ogg/1.3.5 from 'conan-center' - Cache opencv/4.9.0 from 'conan-center' - Cache openexr/3.2.3 from 'conan-center' - Cache openh264/2.3.1 from 'conan-center' - Cache openjpeg/2.5.0 from 'conan-center' - Cache openssl/3.2.1 from 'conan-center' - Cache opus/1.4 from 'conan-center' - Cache protobuf/3.21.12 from 'conan-center' - Cache quirc/1.2 from 'conan-center' - Cache stella-cv-fbow/cci.20240107 from local cache - Cache vorbis/1.3.7 from 'conan-center' - Cache xz_utils/5.4.5 from 'conan-center' - Cache zlib/1.3.1 from 'conan-center' - Cache zstd/1.5.5 from 'conan-center' - Cache Packages ade/0.1.2d:f1a36a2aea2da1148eb4bddd758d8db183c6db83 - Cache brotli/1.1.0:be02a40a028d484cdb3fe3bd1917311741f45707 - Cache bzip2/1.0.8:2b8e4ed96946ad0a4cd2c6e1e01636aa2a421589 - Cache dav1d/1.2.1:b61e8301c5951457e1646835182e61c212a8e40b - Cache eigen/3.4.0:5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9 - Cache ffmpeg/4.4.4:809036ad0c8f09ac98fc55a23fd313ae7391c58a - Cache freetype/2.13.2:3ca56ab0f053cd9252149b736d1f4aa7e7bcfd04 - Cache imath/3.1.9:f1a36a2aea2da1148eb4bddd758d8db183c6db83 - Cache jasper/4.2.0:f7714014b9162eab29bd2812ab2fb87faadc9210 - Cache jbig/20160605:333106d89ea0e397b8d07f777351d990d7294cff - Cache libaom-av1/3.6.1:095512ed878f14a09dd732e9f6868729dd437529 - Cache libdeflate/1.19:095512ed878f14a09dd732e9f6868729dd437529 - Cache libfdk_aac/2.0.3:f1a36a2aea2da1148eb4bddd758d8db183c6db83 - Cache libiconv/1.17:095512ed878f14a09dd732e9f6868729dd437529 - Cache libjpeg/9e:095512ed878f14a09dd732e9f6868729dd437529 - Cache libmp3lame/3.100:095512ed878f14a09dd732e9f6868729dd437529 - Cache libpng/1.6.43:d3500a8154832cbdef2b3c64b5ea936fb3db8fae - Cache libtiff/4.6.0:ac75da022c290e07d960efdc8ca30d23b2ac84bc - Cache libvpx/1.13.1:f1a36a2aea2da1148eb4bddd758d8db183c6db83 - Cache libwebp/1.3.2:308c5571a05200415fe5c9c6f8646dc038e978cd - Cache libx264/cci.20220602:423f84775b051c9bef4cfa4ffae4183b85b2f841 - Cache libx265/3.4:ca28a7483e6ba7a8816416847e808cf80bf56415 - Cache llvm-openmp/17.0.6:f1a36a2aea2da1148eb4bddd758d8db183c6db83 - Cache ogg/1.3.5:095512ed878f14a09dd732e9f6868729dd437529 - Cache opencv/4.9.0:bd08b6789af15f8061d94fbddc3e77919ca47775 - Cache openexr/3.2.3:9e86db134084b6b3b5c681cde0fc6ec6864192ca - Cache openh264/2.3.1:f1a36a2aea2da1148eb4bddd758d8db183c6db83 - Cache openjpeg/2.5.0:095512ed878f14a09dd732e9f6868729dd437529 - Cache openssl/3.2.1:6e01680e043d97040ec80bae3f0e3344aa118d38 - Cache opus/1.4:df8b3c284cdf516a580c12c152e8c20f641579df - Cache protobuf/3.21.12:474ad91bb17976d04806e597430c98f678939920 - Cache quirc/1.2:4a004b5946270762da50d7f292be58cd1548b070 - Cache stella-cv-fbow/cci.20240107:8abb4ac6929b4c9ceac1200cd41d8f96c13bb5f4 - Cache vorbis/1.3.7:0e3cc1b75800c910b363488983a82a164cac70fd - Cache xz_utils/5.4.5:095512ed878f14a09dd732e9f6868729dd437529 - Cache zlib/1.3.1:095512ed878f14a09dd732e9f6868729dd437529 - Cache zstd/1.5.5:661238b4f96795fe90fc778b0834a5026fe2b572 - Cache Installing (downloading, building) binaries... ade/0.1.2d: Already installed! brotli/1.1.0: Already installed! bzip2/1.0.8: Already installed! dav1d/1.2.1: Already installed! eigen/3.4.0: Already installed! imath/3.1.9: Already installed! jbig/20160605: Already installed! libaom-av1/3.6.1: Already installed! libdeflate/1.19: Already installed! libfdk_aac/2.0.3: Already installed! libiconv/1.17: Already installed! libjpeg/9e: Already installed! libmp3lame/3.100: Already installed! libvpx/1.13.1: Already installed! libwebp/1.3.2: Already installed! libx264/cci.20220602: Already installed! libx265/3.4: Already installed! llvm-openmp/17.0.6: Already installed! ogg/1.3.5: Already installed! openh264/2.3.1: Already installed! openjpeg/2.5.0: Already installed! opus/1.4: Already installed! quirc/1.2: Already installed! xz_utils/5.4.5: Already installed! zlib/1.3.1: Already installed! zstd/1.5.5: Already installed! jasper/4.2.0: Already installed! libpng/1.6.43: Already installed! libtiff/4.6.0: Already installed! openexr/3.2.3: Already installed! openssl/3.2.1: Already installed! protobuf/3.21.12: Already installed! vorbis/1.3.7: Already installed! freetype/2.13.2: Already installed! ffmpeg/4.4.4: Already installed! opencv/4.9.0: Already installed! stella-cv-fbow/cci.20240107: Already installed! stella-cv-fbow/cci.20240107 (test package): Generator txt created conanbuildinfo.txt stella-cv-fbow/cci.20240107 (test package): Generator 'CMakeToolchain' calling 'generate()' stella-cv-fbow/cci.20240107 (test package): Preset 'release' added to CMakePresets.json. Invoke it manually using 'cmake --preset release' stella-cv-fbow/cci.20240107 (test package): If your CMake version is not compatible with CMakePresets (<3.19) call cmake like: 'cmake -G "Unix Makefiles" -DCMAKE_TOOLCHAIN_FILE=/Users/jenkins/workspace/prod-v1/bsr/cci-e698f262/recipes/stella-cv-fbow/all/test_package/build/Release/generators/conan_toolchain.cmake -DCMAKE_POLICY_DEFAULT_CMP0091=NEW -DCMAKE_BUILD_TYPE=Release' stella-cv-fbow/cci.20240107 (test package): Generator 'VirtualRunEnv' calling 'generate()' stella-cv-fbow/cci.20240107 (test package): Generator 'CMakeDeps' calling 'generate()' stella-cv-fbow/cci.20240107 (test package): Aggregating env generators stella-cv-fbow/cci.20240107 (test package): Generated conaninfo.txt stella-cv-fbow/cci.20240107 (test package): Generated graphinfo Using lockfile: '/Users/jenkins/workspace/prod-v1/bsr/cci-e698f262/recipes/stella-cv-fbow/all/test_package/build/Release/generators/conan.lock' Using cached profile from lockfile [HOOK - conan-center.py] pre_build(): [FPIC MANAGEMENT (KB-H007)] 'fPIC' option not found [HOOK - conan-center.py] pre_build(): [FPIC MANAGEMENT (KB-H007)] OK stella-cv-fbow/cci.20240107 (test package): Calling build() stella-cv-fbow/cci.20240107 (test package): CMake command: cmake -G "Unix Makefiles" -DCMAKE_TOOLCHAIN_FILE="/Users/jenkins/workspace/prod-v1/bsr/cci-e698f262/recipes/stella-cv-fbow/all/test_package/build/Release/generators/conan_toolchain.cmake" -DCMAKE_POLICY_DEFAULT_CMP0091="NEW" -DCMAKE_BUILD_TYPE="Release" "/Users/jenkins/workspace/prod-v1/bsr/cci-e698f262/recipes/stella-cv-fbow/all/test_package/." ----Running------ > cmake -G "Unix Makefiles" -DCMAKE_TOOLCHAIN_FILE="/Users/jenkins/workspace/prod-v1/bsr/cci-e698f262/recipes/stella-cv-fbow/all/test_package/build/Release/generators/conan_toolchain.cmake" -DCMAKE_POLICY_DEFAULT_CMP0091="NEW" -DCMAKE_BUILD_TYPE="Release" "/Users/jenkins/workspace/prod-v1/bsr/cci-e698f262/recipes/stella-cv-fbow/all/test_package/." ----------------- -- Using Conan toolchain: /Users/jenkins/workspace/prod-v1/bsr/cci-e698f262/recipes/stella-cv-fbow/all/test_package/build/Release/generators/conan_toolchain.cmake -- The C compiler identification is AppleClang 13.0.0.13000029 -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Check for working C compiler: /Applications/conan/xcode/13.0/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc - skipped -- Detecting C compile features -- Detecting C compile features - done -- The CXX compiler identification is AppleClang 13.0.0.13000029 -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done -- Check for working CXX compiler: /Applications/conan/xcode/13.0/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++ - skipped -- Detecting CXX compile features -- Detecting CXX compile features - done -- Conan: Target declared 'fbow::fbow' -- Conan: Component target declared 'opencv_core' -- Conan: Component target declared 'opencv::opencv_core_alias' -- Conan: Component target declared 'opencv_flann' -- Conan: Component target declared 'opencv::opencv_flann_alias' -- Conan: Component target declared 'opencv_imgproc' -- Conan: Component target declared 'opencv::opencv_imgproc_alias' -- Conan: Component target declared 'opencv_ml' -- Conan: Component target declared 'opencv::opencv_ml_alias' -- Conan: Component target declared 'opencv_photo' -- Conan: Component target declared 'opencv::opencv_photo_alias' -- Conan: Component target declared 'opencv_dnn' -- Conan: Component target declared 'opencv::opencv_dnn_alias' -- Conan: Component target declared 'opencv_features2d' -- Conan: Component target declared 'opencv::opencv_features2d_alias' -- Conan: Component target declared 'opencv_imgcodecs' -- Conan: Component target declared 'opencv::opencv_imgcodecs_alias' -- Conan: Component target declared 'opencv_videoio' -- Conan: Component target declared 'opencv::opencv_videoio_alias' -- Conan: Component target declared 'opencv_calib3d' -- Conan: Component target declared 'opencv::opencv_calib3d_alias' -- Conan: Component target declared 'opencv_highgui' -- Conan: Component target declared 'opencv::opencv_highgui_alias' -- Conan: Component target declared 'opencv_objdetect' -- Conan: Component target declared 'opencv::opencv_objdetect_alias' -- Conan: Component target declared 'opencv_stitching' -- Conan: Component target declared 'opencv::opencv_stitching_alias' -- Conan: Component target declared 'opencv_video' -- Conan: Component target declared 'opencv::opencv_video_alias' -- Conan: Component target declared 'opencv_gapi' -- Conan: Component target declared 'opencv::opencv_gapi_alias' -- Conan: Target declared 'opencv::opencv' -- Conan: Component target declared 'Eigen3::Eigen' -- Conan: Target declared 'ZLIB::ZLIB' -- Conan: Component target declared 'protobuf::libprotobuf' -- Conan: Component target declared 'protobuf::libprotoc' -- Conan: Target declared 'protobuf::protobuf' -- Conan: Including build module from '/Users/jenkins/workspace/prod-v1/bsr/38838/ebdad/.conan/data/protobuf/3.21.12/_/_/package/474ad91bb17976d04806e597430c98f678939920/lib/cmake/protobuf/protobuf-generate.cmake' -- Conan: Including build module from '/Users/jenkins/workspace/prod-v1/bsr/38838/ebdad/.conan/data/protobuf/3.21.12/_/_/package/474ad91bb17976d04806e597430c98f678939920/lib/cmake/protobuf/protobuf-module.cmake' -- Conan: Including build module from '/Users/jenkins/workspace/prod-v1/bsr/38838/ebdad/.conan/data/protobuf/3.21.12/_/_/package/474ad91bb17976d04806e597430c98f678939920/lib/cmake/protobuf/protobuf-options.cmake' -- Conan: Target declared 'ade' -- Conan: Target declared 'Jasper::Jasper' -- Conan: Target declared 'JPEG::JPEG' -- Conan: Including build module from '/Users/jenkins/workspace/prod-v1/bsr/38838/ebdad/.conan/data/jasper/4.2.0/_/_/package/f7714014b9162eab29bd2812ab2fb87faadc9210/lib/cmake/conan-official-jasper-variables.cmake' -- Conan: Target declared 'PNG::PNG' -- Conan: Target declared 'TIFF::TIFF' -- Conan: Component target declared 'libdeflate::libdeflate_static' -- Conan: Target declared 'LibLZMA::LibLZMA' -- Conan: Including build module from '/Users/jenkins/workspace/prod-v1/bsr/38838/ebdad/.conan/data/xz_utils/5.4.5/_/_/package/095512ed878f14a09dd732e9f6868729dd437529/lib/cmake/conan-official-xz_utils-variables.cmake' -- Conan: Target declared 'jbig::jbig' -- Conan: Component target declared 'zstd::libzstd_static' -- Conan: Component target declared 'WebP::webpdecoder' -- Conan: Component target declared 'WebP::sharpyuv' -- Conan: Component target declared 'WebP::webp' -- Conan: Component target declared 'WebP::webpdemux' -- Conan: Component target declared 'WebP::libwebpmux' -- Conan: Target declared 'libwebp::libwebp' -- Conan: Component target declared 'OpenEXR::OpenEXRConfig' -- Conan: Component target declared 'OpenEXR::IexConfig' -- Conan: Component target declared 'OpenEXR::IlmThreadConfig' -- Conan: Component target declared 'OpenEXR::Iex' -- Conan: Component target declared 'OpenEXR::IlmThread' -- Conan: Component target declared 'OpenEXR::OpenEXRCore' -- Conan: Component target declared 'OpenEXR::OpenEXR' -- Conan: Component target declared 'OpenEXR::OpenEXRUtil' -- Conan: Target declared 'openexr::openexr' -- Conan: Component target declared 'Imath::ImathConfig' -- Conan: Component target declared 'Imath::Imath' -- Conan: Target declared 'quirc::quirc' -- Conan: Component target declared 'ffmpeg::avutil' -- Conan: Component target declared 'ffmpeg::swscale' -- Conan: Component target declared 'ffmpeg::swresample' -- Conan: Component target declared 'ffmpeg::postproc' -- Conan: Component target declared 'ffmpeg::avcodec' -- Conan: Component target declared 'ffmpeg::avformat' -- Conan: Component target declared 'ffmpeg::avfilter' -- Conan: Component target declared 'ffmpeg::avdevice' -- Conan: Target declared 'ffmpeg::ffmpeg' -- Conan: Target declared 'Freetype::Freetype' -- Conan: Target declared 'BZip2::BZip2' -- Conan: Including build module from '/Users/jenkins/workspace/prod-v1/bsr/38838/ebdad/.conan/data/bzip2/1.0.8/_/_/package/2b8e4ed96946ad0a4cd2c6e1e01636aa2a421589/lib/cmake/conan-official-bzip2-variables.cmake' -- Conan: Component target declared 'brotli::brotlicommon' -- Conan: Component target declared 'brotli::brotlidec' -- Conan: Component target declared 'brotli::brotlienc' -- Conan: Target declared 'brotli::brotli' -- Conan: Including build module from '/Users/jenkins/workspace/prod-v1/bsr/38838/ebdad/.conan/data/freetype/2.13.2/_/_/package/3ca56ab0f053cd9252149b736d1f4aa7e7bcfd04/lib/cmake/conan-official-freetype-variables.cmake' -- Conan: Component target declared 'OpenSSL::Crypto' -- Conan: Component target declared 'OpenSSL::SSL' -- Conan: Target declared 'openssl::openssl' -- Conan: Including build module from '/Users/jenkins/workspace/prod-v1/bsr/38838/ebdad/.conan/data/openssl/3.2.1/_/_/package/6e01680e043d97040ec80bae3f0e3344aa118d38/lib/cmake/conan-official-openssl-variables.cmake' -- Conan: Target declared 'Iconv::Iconv' -- Conan: Target declared 'openjp2' -- Conan: Including build module from '/Users/jenkins/workspace/prod-v1/bsr/38838/ebdad/.conan/data/openjpeg/2.5.0/_/_/package/095512ed878f14a09dd732e9f6868729dd437529/lib/cmake/conan-official-openjpeg-variables.cmake' -- Conan: Target declared 'openh264::openh264' -- Conan: Component target declared 'Vorbis::vorbis' -- Conan: Component target declared 'Vorbis::vorbisenc' -- Conan: Component target declared 'Vorbis::vorbisfile' -- Conan: Component target declared 'vorbis::vorbisenc-alias' -- Conan: Component target declared 'vorbis::vorbisfile-alias' -- Conan: Target declared 'vorbis::vorbis' -- Conan: Component target declared 'Ogg::ogg' -- Conan: Component target declared 'Opus::opus' -- Conan: Target declared 'libx264::libx264' -- Conan: Target declared 'libx265::libx265' -- Conan: Target declared 'libvpx::libvpx' -- Conan: Target declared 'libmp3lame::libmp3lame' -- Conan: Component target declared 'FDK-AAC::fdk-aac' -- Conan: Target declared 'libaom-av1::libaom-av1' -- Conan: Target declared 'dav1d::dav1d' -- Conan: Including build module from '/Users/jenkins/workspace/prod-v1/bsr/38838/ebdad/.conan/data/opencv/4.9.0/_/_/package/bd08b6789af15f8061d94fbddc3e77919ca47775/lib/cmake/conan-official-opencv-variables.cmake' -- Conan: Target declared 'OpenMP::OpenMP' -- Configuring done -- Generating done -- Build files have been written to: /Users/jenkins/workspace/prod-v1/bsr/cci-e698f262/recipes/stella-cv-fbow/all/test_package/build/Release stella-cv-fbow/cci.20240107 (test package): CMake command: cmake --build "/Users/jenkins/workspace/prod-v1/bsr/cci-e698f262/recipes/stella-cv-fbow/all/test_package/build/Release" '--' '-j8' ----Running------ > cmake --build "/Users/jenkins/workspace/prod-v1/bsr/cci-e698f262/recipes/stella-cv-fbow/all/test_package/build/Release" '--' '-j8' ----------------- [ 50%] Building CXX object CMakeFiles/test_package.dir/test_package.cpp.o [100%] Linking CXX executable test_package [100%] Built target test_package stella-cv-fbow/cci.20240107 (test package): Running test() ----Running------ > . "/Users/jenkins/workspace/prod-v1/bsr/cci-e698f262/recipes/stella-cv-fbow/all/test_package/build/Release/generators/conanrun.sh" && ./test_package ----------------- CMake Warning: Manually-specified variables were not used by the project: CMAKE_POLICY_DEFAULT_CMP0091 WARN: *** Conan 1 is legacy and on a deprecation path *** WARN: *** Please upgrade to Conan 2 *** WARN: protobuf/3.21.12: requirement zlib/[>=1.2.11 <2] overridden by opencv/4.9.0 to zlib/1.3.1 WARN: libpng/1.6.43: requirement zlib/[>=1.2.11 <2] overridden by opencv/4.9.0 to zlib/1.3.1 WARN: openexr/3.2.3: requirement zlib/[>=1.2.11 <2] overridden by opencv/4.9.0 to zlib/1.3.1 WARN: libtiff/4.6.0: requirement zlib/[>=1.2.11 <2] overridden by opencv/4.9.0 to zlib/1.3.1 WARN: ffmpeg/4.4.4: requirement zlib/[>=1.2.11 <2] overridden by opencv/4.9.0 to zlib/1.3.1 WARN: freetype/2.13.2: requirement libpng/[>=1.6 <2] overridden by ffmpeg/4.4.4 to libpng/1.6.43 WARN: freetype/2.13.2: requirement zlib/[>=1.2.10 <2] overridden by ffmpeg/4.4.4 to zlib/1.3.1 WARN: openssl/3.2.1: requirement zlib/[>=1.2.11 <2] overridden by ffmpeg/4.4.4 to zlib/1.3.1 stella-cv-fbow/cci.20240107 (test package): WARN: Using the new toolchains and generators without specifying a build profile (e.g: -pr:b=default) is discouraged and might cause failures and unexpected behavior stella-cv-fbow/cci.20240107 (test package): WARN: Using the new toolchains and generators without specifying a build profile (e.g: -pr:b=default) is discouraged and might cause failures and unexpected behavior