Package: src:kf6-kcrash
Version: 6.10.0-1
Severity: important
Tags: sid forky
User: debian-...@lists.debian.org
Usertags: ftbfs-gcc-15

[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/kf6-kcrash_6.10.0-1_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

[...]
   35 |         write(fd, header, strlen(header));
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/build/reproducible-path/kf6-kcrash-6.10.0/src/metadata.cpp: In member function 
‘virtual void KCrash::MetadataINIWriter::add(const char*, const char*, 
KCrash::MetadataWriter::BoolValue)’:
/build/reproducible-path/kf6-kcrash-6.10.0/src/metadata.cpp:63:10: warning: 
ignoring return value of ‘ssize_t write(int, const void*, size_t)’ declared 
with attribute ‘warn_unused_result’ [-Wunused-result]
   63 |     write(fd, key + 2, strlen(key + 2));
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/build/reproducible-path/kf6-kcrash-6.10.0/src/metadata.cpp:64:10: warning: 
ignoring return value of ‘ssize_t write(int, const void*, size_t)’ declared 
with attribute ‘warn_unused_result’ [-Wunused-result]
   64 |     write(fd, "=", 1);
      |     ~~~~~^~~~~~~~~~~~
/build/reproducible-path/kf6-kcrash-6.10.0/src/metadata.cpp:69:22: warning: 
ignoring return value of ‘ssize_t write(int, const void*, size_t)’ declared 
with attribute ‘warn_unused_result’ [-Wunused-result]
   69 |                 write(fd, "\\n", 2);
      |                 ~~~~~^~~~~~~~~~~~~~
/build/reproducible-path/kf6-kcrash-6.10.0/src/metadata.cpp:71:22: warning: 
ignoring return value of ‘ssize_t write(int, const void*, size_t)’ declared 
with attribute ‘warn_unused_result’ [-Wunused-result]
   71 |                 write(fd, &character, 1);
      |                 ~~~~~^~~~~~~~~~~~~~~~~~~
/build/reproducible-path/kf6-kcrash-6.10.0/src/metadata.cpp:75:14: warning: 
ignoring return value of ‘ssize_t write(int, const void*, size_t)’ declared 
with attribute ‘warn_unused_result’ [-Wunused-result]
   75 |         write(fd, valueSpan.data(), valueSpan.size());
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/build/reproducible-path/kf6-kcrash-6.10.0/src/metadata.cpp:77:10: warning: 
ignoring return value of ‘ssize_t write(int, const void*, size_t)’ declared 
with attribute ‘warn_unused_result’ [-Wunused-result]
   77 |     write(fd, "\n", 1);
      |     ~~~~~^~~~~~~~~~~~~
In file included from 
/build/reproducible-path/kf6-kcrash-6.10.0/autotests/metadatatest.cpp:8:
/build/reproducible-path/kf6-kcrash-6.10.0/autotests/../src/metadata.cpp: In 
constructor ‘KCrash::MetadataINIWriter::MetadataINIWriter(const QByteArray&)’:
/build/reproducible-path/kf6-kcrash-6.10.0/autotests/../src/metadata.cpp:35:14: 
warning: ignoring return value of ‘ssize_t write(int, const void*, size_t)’ 
declared with attribute ‘warn_unused_result’ [-Wunused-result]
   35 |         write(fd, header, strlen(header));
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/build/reproducible-path/kf6-kcrash-6.10.0/autotests/../src/metadata.cpp: In 
member function ‘virtual void KCrash::MetadataINIWriter::add(const char*, const 
char*, KCrash::MetadataWriter::BoolValue)’:
/build/reproducible-path/kf6-kcrash-6.10.0/autotests/../src/metadata.cpp:63:10: 
warning: ignoring return value of ‘ssize_t write(int, const void*, size_t)’ 
declared with attribute ‘warn_unused_result’ [-Wunused-result]
   63 |     write(fd, key + 2, strlen(key + 2));
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/build/reproducible-path/kf6-kcrash-6.10.0/autotests/../src/metadata.cpp:64:10: 
warning: ignoring return value of ‘ssize_t write(int, const void*, size_t)’ 
declared with attribute ‘warn_unused_result’ [-Wunused-result]
   64 |     write(fd, "=", 1);
      |     ~~~~~^~~~~~~~~~~~
/build/reproducible-path/kf6-kcrash-6.10.0/autotests/../src/metadata.cpp:69:22: 
warning: ignoring return value of ‘ssize_t write(int, const void*, size_t)’ 
declared with attribute ‘warn_unused_result’ [-Wunused-result]
   69 |                 write(fd, "\\n", 2);
      |                 ~~~~~^~~~~~~~~~~~~~
/build/reproducible-path/kf6-kcrash-6.10.0/autotests/../src/metadata.cpp:71:22: 
warning: ignoring return value of ‘ssize_t write(int, const void*, size_t)’ 
declared with attribute ‘warn_unused_result’ [-Wunused-result]
   71 |                 write(fd, &character, 1);
      |                 ~~~~~^~~~~~~~~~~~~~~~~~~
/build/reproducible-path/kf6-kcrash-6.10.0/autotests/../src/metadata.cpp:75:14: 
warning: ignoring return value of ‘ssize_t write(int, const void*, size_t)’ 
declared with attribute ‘warn_unused_result’ [-Wunused-result]
   75 |         write(fd, valueSpan.data(), valueSpan.size());
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/build/reproducible-path/kf6-kcrash-6.10.0/autotests/../src/metadata.cpp:77:10: 
warning: ignoring return value of ‘ssize_t write(int, const void*, size_t)’ 
declared with attribute ‘warn_unused_result’ [-Wunused-result]
   77 |     write(fd, "\n", 1);
      |     ~~~~~^~~~~~~~~~~~~
[ 50%] Linking CXX executable ../bin/coreconfigtest
cd /build/reproducible-path/kf6-kcrash-6.10.0/obj-x86_64-linux-gnu/autotests && 
/usr/bin/cmake -E cmake_link_script CMakeFiles/coreconfigtest.dir/link.txt 
--verbose=1
/usr/bin/c++ -g -O2 
-fdebug-prefix-map=/build/reproducible-path/kf6-kcrash-6.10.0=. 
-fstack-protector-strong -fstack-clash-protection -Wformat 
-Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 
-fno-operator-names -fno-exceptions -Wall -Wextra -Wcast-align 
-Wchar-subscripts -Wformat-security -Wno-long-long -Wpointer-arith -Wundef 
-Wnon-virtual-dtor -Woverloaded-virtual -Werror=return-type -Werror=init-self 
-Werror=undef -Wvla -Wdate-time -Wsuggest-override -Wlogical-op -pedantic 
-Wzero-as-null-pointer-constant -Wmissing-include-dirs -Wl,--enable-new-dtags 
-Wl,-z,relro -Wl,-z,now 
CMakeFiles/coreconfigtest.dir/coreconfigtest_autogen/mocs_compilation.cpp.o 
CMakeFiles/coreconfigtest.dir/coreconfigtest.cpp.o -o ../bin/coreconfigtest  
/usr/lib/x86_64-linux-gnu/libQt6Test.so.6.7.2 
/usr/lib/x86_64-linux-gnu/libQt6Core.so.6.7.2
make[3]: Leaving directory 
'/build/reproducible-path/kf6-kcrash-6.10.0/obj-x86_64-linux-gnu'
[ 53%] Built target coreconfigtest
[ 56%] Linking CXX executable ../bin/metadatatest
cd /build/reproducible-path/kf6-kcrash-6.10.0/obj-x86_64-linux-gnu/autotests && 
/usr/bin/cmake -E cmake_link_script CMakeFiles/metadatatest.dir/link.txt 
--verbose=1
/usr/bin/c++ -g -O2 
-fdebug-prefix-map=/build/reproducible-path/kf6-kcrash-6.10.0=. 
-fstack-protector-strong -fstack-clash-protection -Wformat 
-Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 
-fno-operator-names -fno-exceptions -Wall -Wextra -Wcast-align 
-Wchar-subscripts -Wformat-security -Wno-long-long -Wpointer-arith -Wundef 
-Wnon-virtual-dtor -Woverloaded-virtual -Werror=return-type -Werror=init-self 
-Werror=undef -Wvla -Wdate-time -Wsuggest-override -Wlogical-op -pedantic 
-Wzero-as-null-pointer-constant -Wmissing-include-dirs -Wl,--enable-new-dtags 
-Wl,-z,relro -Wl,-z,now 
CMakeFiles/metadatatest.dir/metadatatest_autogen/mocs_compilation.cpp.o 
CMakeFiles/metadatatest.dir/metadatatest.cpp.o -o ../bin/metadatatest  
/usr/lib/x86_64-linux-gnu/libQt6Test.so.6.7.2 
/usr/lib/x86_64-linux-gnu/libQt6Core.so.6.7.2
make[3]: Leaving directory 
'/build/reproducible-path/kf6-kcrash-6.10.0/obj-x86_64-linux-gnu'
[ 60%] Built target metadatatest
[ 63%] Linking CXX shared library ../bin/libKF6Crash.so
cd /build/reproducible-path/kf6-kcrash-6.10.0/obj-x86_64-linux-gnu/src && 
/usr/bin/cmake -E cmake_link_script CMakeFiles/KF6Crash.dir/link.txt --verbose=1
/usr/bin/ld: CMakeFiles/KF6Crash.dir/kcrash.cpp.o:(.rodata+0x37): multiple 
definition of `QtPrivate::IsFloatType_v<_Float16>'; 
CMakeFiles/KF6Crash.dir/coreconfig.cpp.o:(.rodata+0x0): first defined here
/usr/bin/ld: CMakeFiles/KF6Crash.dir/kcrash_debug.cpp.o:(.rodata+0x0): multiple 
definition of `QtPrivate::IsFloatType_v<_Float16>'; 
CMakeFiles/KF6Crash.dir/coreconfig.cpp.o:(.rodata+0x0): first defined here
collect2: error: ld returned 1 exit status
/usr/bin/c++ -fPIC -g -O2 
-fdebug-prefix-map=/build/reproducible-path/kf6-kcrash-6.10.0=. 
-fstack-protector-strong -fstack-clash-protection -Wformat 
-Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 
-fno-operator-names -fno-exceptions -Wall -Wextra -Wcast-align 
-Wchar-subscripts -Wformat-security -Wno-long-long -Wpointer-arith -Wundef 
-Wnon-virtual-dtor -Woverloaded-virtual -Werror=return-type -Werror=init-self 
-Werror=undef -Wvla -Wdate-time -Wsuggest-override -Wlogical-op -pedantic 
-Wzero-as-null-pointer-constant -Wmissing-include-dirs -Wl,--no-undefined 
-Wl,--fatal-warnings -Wl,--enable-new-dtags -Wl,-z,relro -Wl,-z,now -shared 
-Wl,-soname,libKF6Crash.so.6 -o ../bin/libKF6Crash.so.6.10.0 
CMakeFiles/KF6Crash.dir/KF6Crash_autogen/mocs_compilation.cpp.o 
CMakeFiles/KF6Crash.dir/coreconfig.cpp.o CMakeFiles/KF6Crash.dir/kcrash.cpp.o 
CMakeFiles/KF6Crash.dir/metadata.cpp.o CMakeFiles/KF6Crash.dir/exception.cpp.o 
CMakeFiles/KF6Crash.dir/kcrash_debug.cpp.o  /usr/lib/x8
 6_64-linux-gnu/libQt6OpenGL.so.6.7.2 
/usr/lib/x86_64-linux-gnu/libKF6CoreAddons.so.6.10.0 
/usr/lib/x86_64-linux-gnu/libX11.so 
/usr/lib/x86_64-linux-gnu/libQt6Gui.so.6.7.2 
/usr/lib/x86_64-linux-gnu/libGLX.so /usr/lib/x86_64-linux-gnu/libOpenGL.so 
/usr/lib/x86_64-linux-gnu/libQt6Core.so.6.7.2
make[3]: *** [src/CMakeFiles/KF6Crash.dir/build.make:192: 
bin/libKF6Crash.so.6.10.0] Error 1
make[3]: Leaving directory 
'/build/reproducible-path/kf6-kcrash-6.10.0/obj-x86_64-linux-gnu'
make[2]: *** [CMakeFiles/Makefile2:287: src/CMakeFiles/KF6Crash.dir/all] Error 2
make[2]: Leaving directory 
'/build/reproducible-path/kf6-kcrash-6.10.0/obj-x86_64-linux-gnu'
make[1]: *** [Makefile:149: all] Error 2
make[1]: Leaving directory 
'/build/reproducible-path/kf6-kcrash-6.10.0/obj-x86_64-linux-gnu'
dh_auto_build: error: cd obj-x86_64-linux-gnu && make -j8 "INSTALL=install 
--strip-program=true" VERBOSE=1 returned exit code 2
make: *** [debian/rules:8: binary] Error 25
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2

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