[3dprinter-general] Bug#1074897: cura-engine: ftbfs with GCC-14

[Matthias Klose]

Package: src:cura-engine
Version: 1:5.0.0-4
Severity: important
Tags: sid trixie
User: debian-gcc at lists.debian.org
Usertags: ftbfs-gcc-14

[This bug is 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-14/g++-14, but succeeds to build with gcc-13/g++-13. The
severity of this report will be raised before the trixie release.

The full build log can be found at:
http://qa-logs.debian.net/2024/07/01/cura-engine_5.0.0-4_unstable_gccexp.log
The last lines of the build log are at the end of this report.

To build with GCC 14, either set CC=gcc-14 CXX=g++-14 explicitly,
or install the gcc, g++, gfortran, ... packages from experimental.

  apt-get -t=experimental install g++ 

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-14/porting_to.html

[...]

-- Found GTest: /usr/lib/x86_64-linux-gnu/libgtest.a
-- Found GMock: /usr/lib/x86_64-linux-gnu/libgmock.a
-- Configuring done (1.8s)
-- Generating done (0.1s)
CMake Warning:
  Manually-specified variables were not used by the project:

    CMAKE_EXPORT_NO_PACKAGE_REGISTRY
    CMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY
    FETCHCONTENT_FULLY_DISCONNECTED


-- Build files have been written to: /<<PKGBUILDDIR>>/obj-x86_64-linux-gnu
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	cd obj-x86_64-linux-gnu && make -j8 "INSTALL=install --strip-program=true" VERBOSE=1
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/usr/bin/c++ -DARCUS -DBUILD_TESTS -DBUILD_TESTS=1 -DVERSION=\"5.0.0\" -I/<<PKGBUILDDIR>>/src -I/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu -I/usr/include/stb -g -O2 -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -std=c++17 -fopenmp -MD -MT CMakeFiles/_CuraEngine.dir/src/FffProcessor.cpp.o -MF CMakeFiles/_CuraEngine.dir/src/FffProcessor.cpp.o.d -o CMakeFiles/_CuraEngine.dir/src/FffProcessor.cpp.o -c /<<PKGBUILDDIR>>/src/FffProcessor.cpp
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[  5%] Building CXX object CMakeFiles/_CuraEngine.dir/src/GCodePathConfig.cpp.o
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In file included from /<<PKGBUILDDIR>>/src/communication/CommandLine.h:7,
                 from /<<PKGBUILDDIR>>/src/Application.cpp:11:
/usr/include/rapidjson/document.h: In member function ‘rapidjson::GenericStringRef<CharType>& rapidjson::GenericStringRef<CharType>::operator=(const rapidjson::GenericStringRef<CharType>&)’:
/usr/include/rapidjson/document.h:319:82: error: assignment of read-only member ‘rapidjson::GenericStringRef<CharType>::length’
  319 |     GenericStringRef& operator=(const GenericStringRef& rhs) { s = rhs.s; length = rhs.length; }
      |                                                                           ~~~~~~~^~~~~~~~~~~~
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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:10: build] Error 25
dpkg-buildpackage: error: debian/rules build subprocess returned exit status 2