[This bug is NOT targeted to the upcoming trixie release] Please keep this issue open in the bug tracker for the package it was filed for. If a fix in another package is required, please file a bug for the other package (or clone), and add a block in this package. Please keep the issue open until the package can be built in a follow-up test rebuild. The package fails to build in a test rebuild on at least amd64 with gcc-15/g++-15, but succeeds to build with gcc-14/g++-14. The severity of this report will be raised before the forky release. The full build log can be found at: http://qa-logs.debian.net/2025/02/16/amd64exp/pyqt6_6.8.1-1_unstable_gccexp.log.gz The last lines of the build log are at the end of this report. To build with GCC 15, either set CC=gcc-15 CXX=g++-15 explicitly, or install the gcc, g++, gfortran, ... packages from experimental. apt-get -t=experimental install g++ GCC 15 now defaults to the C23/C++23 standards, exposing many FTBFS. Other Common build failures are new warnings resulting in build failures with -Werror turned on, or new/dropped symbols in Debian symbols files. For other C/C++ related build failures see the porting guide at http://gcc.gnu.org/gcc-15/porting_to.html [...] Reading /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/QtQml/QtQml.pro Reading /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/QtWidgets/QtWidgets.pro Reading /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/QtDBus/QtDBus.pro Reading /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/QtDesigner/QtDesigner.pro Reading /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/QtHelp/QtHelp.pro Reading /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/QtOpenGL/QtOpenGL.pro Reading /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/QtOpenGLWidgets/QtOpenGLWidgets.pro Reading /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/QtPrintSupport/QtPrintSupport.pro Reading /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/QtQuick/QtQuick.pro Reading /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/QtQuick3D/QtQuick3D.pro Reading /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/QtQuickWidgets/QtQuickWidgets.pro Reading /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/QtSql/QtSql.pro Reading /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/QtSvg/QtSvg.pro Reading /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/QtSvgWidgets/QtSvgWidgets.pro Reading /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/QtTest/QtTest.pro Reading /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/QtXml/QtXml.pro Reading /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/QtMultimedia/QtMultimedia.pro Reading /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/QtMultimediaWidgets/QtMultimediaWidgets.pro Reading /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/QtPositioning/QtPositioning.pro Reading /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/QtRemoteObjects/QtRemoteObjects.pro Reading /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/QtSensors/QtSensors.pro Reading /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/QtSerialPort/QtSerialPort.pro Reading /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/QtWebChannel/QtWebChannel.pro Reading /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/QtWebSockets/QtWebSockets.pro Reading /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/QtBluetooth/QtBluetooth.pro Reading /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/QtNfc/QtNfc.pro Reading /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/QtPdf/QtPdf.pro Reading /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/QtPdfWidgets/QtPdfWidgets.pro Reading /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/QtSpatialAudio/QtSpatialAudio.pro Reading /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/QtTextToSpeech/QtTextToSpeech.pro Reading /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/QtStateMachine/QtStateMachine.pro The project has been built. dh_auto_build -O--buildsystem=pybuild I: pybuild base:311: /usr/bin/make -C /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.12/build make[1]: Entering directory '/build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.12/build' cd designer/ && ( test -e Makefile || /usr/lib/qt6/bin/qmake -o Makefile /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.12/build/designer/designer.pro ) && /usr/bin/make -f Makefile make[2]: Entering directory '/build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.12/build/designer' g++ -c -pipe -g -O2 -ffile-prefix-map=/build/reproducible-path/pyqt6-6.8.1=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -O2 -Wall -Wextra -D_REENTRANT -fPIC -DPYTHON_LIB=\"/usr/lib/x86_64-linux-gnu/libpython3.12\" -DQT_NO_DEBUG -DQT_PLUGIN -DQT_DESIGNER_LIB -DQT_UIPLUGIN_LIB -DQT_OPENGLWIDGETS_LIB -DQT_WIDGETS_LIB -DQT_OPENGL_LIB -DQT_GUI_LIB -DQT_XML_LIB -DQT_CORE_LIB -DQDESIGNER_EXPORT_WIDGETS -I. -I/usr/include/python3.12 -I../../../../designer -I/usr/include/x86_64-linux-gnu/qt6 -I/usr/include/x86_64-linux-gnu/qt6/QtDesigner -I/usr/include/x86_64-linux-gnu/qt6/QtUiPlugin -I/usr/include/x86_64-linux-gnu/qt6/QtOpenGLWidgets -I/usr/include/x86_64-linux-gnu/qt6/QtWidgets -I/usr/include/x86_64-linux-gnu/qt6/QtOpenGL -I/usr/include/x86_64-linux-gnu/qt6/QtGui -I/usr/include/x86_64-linux-gnu/qt6/QtXml -I/usr/include/x86_64-linux-gnu/qt6/QtCore -I. -I/usr/lib/x86_64-linux-gnu/qt6/mkspecs/linux-g++ -o pluginloader.o ../../../../designer/pluginloader.cpp g++ -pipe -g -O2 -ffile-prefix-map=/build/reproducible-path/pyqt6-6.8.1=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -O2 -Wall -Wextra -dM -E -o moc_predefs.h /usr/lib/x86_64-linux-gnu/qt6/mkspecs/features/data/dummy.cpp /usr/lib/qt6/libexec/moc -DPYTHON_LIB=\"/usr/lib/x86_64-linux-gnu/libpython3.12\" -DQT_NO_DEBUG -DQT_PLUGIN -DQT_DESIGNER_LIB -DQT_UIPLUGIN_LIB -DQT_OPENGLWIDGETS_LIB -DQT_WIDGETS_LIB -DQT_OPENGL_LIB -DQT_GUI_LIB -DQT_XML_LIB -DQT_CORE_LIB -DQDESIGNER_EXPORT_WIDGETS --include /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.12/build/designer/moc_predefs.h -I/usr/lib/x86_64-linux-gnu/qt6/mkspecs/linux-g++ -I/build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.12/build/designer -I/usr/include/python3.12 -I/build/reproducible-path/pyqt6-6.8.1/designer -I/usr/include/x86_64-linux-gnu/qt6 -I/usr/include/x86_64-linux-gnu/qt6/QtDesigner -I/usr/include/x86_64-linux-gnu/qt6/QtUiPlugin -I/usr/include/x86_64-linux-gnu/qt6/QtOpenGLWidgets -I/usr/include/x86_64-linux-gnu/qt6/QtWidgets -I/usr/include/x86_64-linux-gnu/qt6/QtOpenGL -I/usr/include/x86_64-linux-gnu/qt6/QtGui -I/usr/include/x86_64-linux-gnu/qt6/QtXml -I/usr/include/x86_64-linux-gnu/qt6/QtCore -I/usr/include/c++/15 -I/usr/include/x86_64-linux-gnu/c++/15 -I/usr/include/c++/15/backward -I/usr/lib/gcc/x86_64-linux-gnu/15/include -I/usr/local/include -I/usr/include/x86_64-linux-gnu -I/usr/include ../../../../designer/pluginloader.h -o moc_pluginloader.cpp g++ -c -pipe -g -O2 -ffile-prefix-map=/build/reproducible-path/pyqt6-6.8.1=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -O2 -Wall -Wextra -D_REENTRANT -fPIC -DPYTHON_LIB=\"/usr/lib/x86_64-linux-gnu/libpython3.12\" -DQT_NO_DEBUG -DQT_PLUGIN -DQT_DESIGNER_LIB -DQT_UIPLUGIN_LIB -DQT_OPENGLWIDGETS_LIB -DQT_WIDGETS_LIB -DQT_OPENGL_LIB -DQT_GUI_LIB -DQT_XML_LIB -DQT_CORE_LIB -DQDESIGNER_EXPORT_WIDGETS -I. -I/usr/include/python3.12 -I../../../../designer -I/usr/include/x86_64-linux-gnu/qt6 -I/usr/include/x86_64-linux-gnu/qt6/QtDesigner -I/usr/include/x86_64-linux-gnu/qt6/QtUiPlugin -I/usr/include/x86_64-linux-gnu/qt6/QtOpenGLWidgets -I/usr/include/x86_64-linux-gnu/qt6/QtWidgets -I/usr/include/x86_64-linux-gnu/qt6/QtOpenGL -I/usr/include/x86_64-linux-gnu/qt6/QtGui -I/usr/include/x86_64-linux-gnu/qt6/QtXml -I/usr/include/x86_64-linux-gnu/qt6/QtCore -I. -I/usr/lib/x86_64-linux-gnu/qt6/mkspecs/linux-g++ -o moc_pluginloader.o moc_pluginloader.cpp rm -f libpyqt6.so g++ -Wl,-z,relro -Wl,-O1 -Wl,-rpath-link,/usr/lib/x86_64-linux-gnu -shared -o libpyqt6.so pluginloader.o moc_pluginloader.o -L/usr/lib/x86_64-linux-gnu -lpython3.12 /usr/lib/x86_64-linux-gnu/libQt6Designer.so /usr/lib/x86_64-linux-gnu/libQt6OpenGLWidgets.so /usr/lib/x86_64-linux-gnu/libQt6Widgets.so /usr/lib/x86_64-linux-gnu/libQt6OpenGL.so /usr/lib/x86_64-linux-gnu/libQt6Gui.so /usr/lib/x86_64-linux-gnu/libGLX.so /usr/lib/x86_64-linux-gnu/libOpenGL.so /usr/lib/x86_64-linux-gnu/libQt6Xml.so /usr/lib/x86_64-linux-gnu/libQt6Core.so -lpthread -lGLX -lOpenGL /usr/bin/ld: moc_pluginloader.o:(.rodata+0x58): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; pluginloader.o:(.rodata+0x0): first defined here collect2: error: ld returned 1 exit status make[2]: *** [Makefile:218: libpyqt6.so] Error 1 make[2]: Leaving directory '/build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.12/build/designer' make[1]: *** [Makefile:83: sub-designer-make_first-ordered] Error 2 make[1]: Leaving directory '/build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.12/build' E: pybuild pybuild:389: build: plugin custom failed with: exit code=2: /usr/bin/make -C /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.12/build I: pybuild base:311: /usr/bin/make -C /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build make[1]: Entering directory '/build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build' cd designer/ && ( test -e Makefile || /usr/lib/qt6/bin/qmake -o Makefile /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/designer/designer.pro ) && /usr/bin/make -f Makefile make[2]: Entering directory '/build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/designer' g++ -c -pipe -g -O2 -ffile-prefix-map=/build/reproducible-path/pyqt6-6.8.1=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -O2 -Wall -Wextra -D_REENTRANT -fPIC -DPYTHON_LIB=\"/usr/lib/x86_64-linux-gnu/libpython3.13\" -DQT_NO_DEBUG -DQT_PLUGIN -DQT_DESIGNER_LIB -DQT_UIPLUGIN_LIB -DQT_OPENGLWIDGETS_LIB -DQT_WIDGETS_LIB -DQT_OPENGL_LIB -DQT_GUI_LIB -DQT_XML_LIB -DQT_CORE_LIB -DQDESIGNER_EXPORT_WIDGETS -I. -I/usr/include/python3.13 -I../../../../designer -I/usr/include/x86_64-linux-gnu/qt6 -I/usr/include/x86_64-linux-gnu/qt6/QtDesigner -I/usr/include/x86_64-linux-gnu/qt6/QtUiPlugin -I/usr/include/x86_64-linux-gnu/qt6/QtOpenGLWidgets -I/usr/include/x86_64-linux-gnu/qt6/QtWidgets -I/usr/include/x86_64-linux-gnu/qt6/QtOpenGL -I/usr/include/x86_64-linux-gnu/qt6/QtGui -I/usr/include/x86_64-linux-gnu/qt6/QtXml -I/usr/include/x86_64-linux-gnu/qt6/QtCore -I. -I/usr/lib/x86_64-linux-gnu/qt6/mkspecs/linux-g++ -o pluginloader.o ../../../../designer/pluginloader.cpp g++ -pipe -g -O2 -ffile-prefix-map=/build/reproducible-path/pyqt6-6.8.1=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -O2 -Wall -Wextra -dM -E -o moc_predefs.h /usr/lib/x86_64-linux-gnu/qt6/mkspecs/features/data/dummy.cpp /usr/lib/qt6/libexec/moc -DPYTHON_LIB=\"/usr/lib/x86_64-linux-gnu/libpython3.13\" -DQT_NO_DEBUG -DQT_PLUGIN -DQT_DESIGNER_LIB -DQT_UIPLUGIN_LIB -DQT_OPENGLWIDGETS_LIB -DQT_WIDGETS_LIB -DQT_OPENGL_LIB -DQT_GUI_LIB -DQT_XML_LIB -DQT_CORE_LIB -DQDESIGNER_EXPORT_WIDGETS --include /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/designer/moc_predefs.h -I/usr/lib/x86_64-linux-gnu/qt6/mkspecs/linux-g++ -I/build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/designer -I/usr/include/python3.13 -I/build/reproducible-path/pyqt6-6.8.1/designer -I/usr/include/x86_64-linux-gnu/qt6 -I/usr/include/x86_64-linux-gnu/qt6/QtDesigner -I/usr/include/x86_64-linux-gnu/qt6/QtUiPlugin -I/usr/include/x86_64-linux-gnu/qt6/QtOpenGLWidgets -I/usr/include/x86_64-linux-gnu/qt6/QtWidgets -I/usr/include/x86_64-linux-gnu/qt6/QtOpenGL -I/usr/include/x86_64-linux-gnu/qt6/QtGui -I/usr/include/x86_64-linux-gnu/qt6/QtXml -I/usr/include/x86_64-linux-gnu/qt6/QtCore -I/usr/include/c++/15 -I/usr/include/x86_64-linux-gnu/c++/15 -I/usr/include/c++/15/backward -I/usr/lib/gcc/x86_64-linux-gnu/15/include -I/usr/local/include -I/usr/include/x86_64-linux-gnu -I/usr/include ../../../../designer/pluginloader.h -o moc_pluginloader.cpp g++ -c -pipe -g -O2 -ffile-prefix-map=/build/reproducible-path/pyqt6-6.8.1=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -O2 -Wall -Wextra -D_REENTRANT -fPIC -DPYTHON_LIB=\"/usr/lib/x86_64-linux-gnu/libpython3.13\" -DQT_NO_DEBUG -DQT_PLUGIN -DQT_DESIGNER_LIB -DQT_UIPLUGIN_LIB -DQT_OPENGLWIDGETS_LIB -DQT_WIDGETS_LIB -DQT_OPENGL_LIB -DQT_GUI_LIB -DQT_XML_LIB -DQT_CORE_LIB -DQDESIGNER_EXPORT_WIDGETS -I. -I/usr/include/python3.13 -I../../../../designer -I/usr/include/x86_64-linux-gnu/qt6 -I/usr/include/x86_64-linux-gnu/qt6/QtDesigner -I/usr/include/x86_64-linux-gnu/qt6/QtUiPlugin -I/usr/include/x86_64-linux-gnu/qt6/QtOpenGLWidgets -I/usr/include/x86_64-linux-gnu/qt6/QtWidgets -I/usr/include/x86_64-linux-gnu/qt6/QtOpenGL -I/usr/include/x86_64-linux-gnu/qt6/QtGui -I/usr/include/x86_64-linux-gnu/qt6/QtXml -I/usr/include/x86_64-linux-gnu/qt6/QtCore -I. -I/usr/lib/x86_64-linux-gnu/qt6/mkspecs/linux-g++ -o moc_pluginloader.o moc_pluginloader.cpp rm -f libpyqt6.so g++ -Wl,-z,relro -Wl,-O1 -Wl,-rpath-link,/usr/lib/x86_64-linux-gnu -shared -o libpyqt6.so pluginloader.o moc_pluginloader.o -L/usr/lib/x86_64-linux-gnu -lpython3.13 /usr/lib/x86_64-linux-gnu/libQt6Designer.so /usr/lib/x86_64-linux-gnu/libQt6OpenGLWidgets.so /usr/lib/x86_64-linux-gnu/libQt6Widgets.so /usr/lib/x86_64-linux-gnu/libQt6OpenGL.so /usr/lib/x86_64-linux-gnu/libQt6Gui.so /usr/lib/x86_64-linux-gnu/libGLX.so /usr/lib/x86_64-linux-gnu/libOpenGL.so /usr/lib/x86_64-linux-gnu/libQt6Xml.so /usr/lib/x86_64-linux-gnu/libQt6Core.so -lpthread -lGLX -lOpenGL /usr/bin/ld: moc_pluginloader.o:(.rodata+0x58): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; pluginloader.o:(.rodata+0x0): first defined here collect2: error: ld returned 1 exit status make[2]: *** [Makefile:218: libpyqt6.so] Error 1 make[2]: Leaving directory '/build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build/designer' make[1]: *** [Makefile:83: sub-designer-make_first-ordered] Error 2 make[1]: Leaving directory '/build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build' E: pybuild pybuild:389: build: plugin custom failed with: exit code=2: /usr/bin/make -C /build/reproducible-path/pyqt6-6.8.1/.pybuild/cpython3_3.13/build dh_auto_build: error: pybuild --build -i python{version} -p "3.12 3.13" returned exit code 13 make: *** [debian/rules:22: binary] Error 25 dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2