libmamba 2.0.5 fails to build on Fedora rawhide

[opoplawski]

Troubleshooting docs

• My problem is not solved in the Troubleshooting docs

Anaconda default channels

• I do NOT use the Anaconda default channels (pkgs/* etc.)

How did you install Mamba?

Other (please describe)

Search tried in issue tracker

error may be used uninitialized

Latest version of Mamba

• My problem is not solved with the latest version

Tried in Conda?

I have this problem with Conda as well, without using Mamba

Describe your issue

cd /builddir/build/BUILD/libmamba-2.0.5-build/mamba-libmamba-2.0.5/redhat-linux-build/libmambapy && /usr/lib64/ccache/g++ -DFMT_SHARED -DMAMBA_USE_INSTALL_PREFIX_AS_BASE -DSPDLOG_FMT_EXTERNAL -Dbindings_EXPORTS -I/builddir/build/BUILD/libmamba-2.0.5-build/mamba-libmamba-2.0.5/libmambapy/src/libmambapy/bindings -I/builddir/build/BUILD/libmamba-2.0.5-build/mamba-libmamba-2.0.5/libmamba/include -isystem /usr/include/python3.13 -isystem /usr/share -O2 -flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-U_FORTIFY_SOURCE,-D_FORTIFY_SOURCE=3 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1  -m64 -march=x86-64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -mtls-dialect=gnu2 -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -O2 -g -DNDEBUG -fPIC -fvisibility=hidden -Wall -Wextra -Wshadow -Wnon-virtual-dtor -Wold-style-cast -Wcast-align -Wunused -Woverloaded-virtual -Wpedantic -Wconversion -Wsign-conversion -Wnull-dereference -Wdouble-promotion -Wformat=2 -Wunreachable-code -Wuninitialized -Werror -Wmisleading-indentation -Wduplicated-cond -Wduplicated-branches -Wlogical-op -Wuseless-cast -Wno-error=deprecated-declarations -MD -MT libmambapy/CMakeFiles/bindings.dir/src/libmambapy/bindings/legacy.cpp.o -MF CMakeFiles/bindings.dir/src/libmambapy/bindings/legacy.cpp.o.d -o CMakeFiles/bindings.dir/src/libmambapy/bindings/legacy.cpp.o -c /builddir/build/BUILD/libmamba-2.0.5-build/mamba-libmamba-2.0.5/libmambapy/src/libmambapy/bindings/legacy.cpp
/builddir/build/BUILD/libmamba-2.0.5-build/mamba-libmamba-2.0.5/libmambapy/src/libmambapy/bindings/legacy.cpp: In lambda function:
/builddir/build/BUILD/libmamba-2.0.5-build/mamba-libmamba-2.0.5/libmambapy/src/libmambapy/bindings/legacy.cpp:557:47: warning: ‘mamba::expected_t<std::__cxx11::basic_string<char> > mamba::SubdirData::cache_path() const’ is deprecated: since version 2.0 use ``valid_solv_cache`` or ``valid_json_cache`` instead [-Wdeprecated-declarations]
  557 |                 return extract(self.cache_path());
      |                                ~~~~~~~~~~~~~~~^~
In file included from /builddir/build/BUILD/libmamba-2.0.5-build/mamba-libmamba-2.0.5/libmambapy/src/libmambapy/bindings/legacy.cpp:30:
/builddir/build/BUILD/libmamba-2.0.5-build/mamba-libmamba-2.0.5/libmamba/include/mamba/core/subdirdata.hpp:135:33: note: declared here
  135 |         expected_t<std::string> cache_path() const;
      |                                 ^~~~~~~~~~
In file included from /usr/include/pybind11/attr.h:14,
                 from /usr/include/pybind11/detail/class.h:12,
                 from /usr/include/pybind11/pybind11.h:12,
                 from /usr/include/pybind11/functional.h:14,
                 from /builddir/build/BUILD/libmamba-2.0.5-build/mamba-libmamba-2.0.5/libmambapy/src/libmambapy/bindings/legacy.cpp:11:
In function ‘pybind11::detail::collect_arguments<(pybind11::return_value_policy)1, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&, pybind11::detail::accessor<pybind11::detail::accessor_policies::str_attr>, pybind11::arg_v, void>(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&, pybind11::detail::accessor<pybind11::detail::accessor_policies::str_attr>&&, pybind11::arg_v&&)pybind11::detail::unpacking_collector<(pybind11::return_value_policy)1>’,
    inlined from ‘pybind11::detail::object_api<pybind11::detail::accessor<pybind11::detail::accessor_policies::str_attr> >::operator()<(pybind11::return_value_policy)1, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&, pybind11::detail::accessor<pybind11::detail::accessor_policies::str_attr>, pybind11::arg_v>(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&, pybind11::detail::accessor<pybind11::detail::accessor_policies::str_attr>&&, pybind11::arg_v&&) constpybind11::object’ at /usr/include/pybind11/cast.h:1823:45,
    inlined from ‘deprecated(std::basic_string_view<char, std::char_traits<char> >, std::basic_string_view<char, std::char_traits<char> >)’ at /builddir/build/BUILD/libmamba-2.0.5-build/mamba-libmamba-2.0.5/libmambapy/src/libmambapy/bindings/legacy.cpp:52:26:
/usr/include/pybind11/cast.h:1812:67: error: ‘SR.32267’ may be used uninitialized [-Werror=maybe-uninitialized]
 1812 |     return unpacking_collector<policy>(std::forward<Args>(args)...);
      |                                                                   ^
/usr/include/pybind11/cast.h: In function ‘deprecated(std::basic_string_view<char, std::char_traits<char> >, std::basic_string_view<char, std::char_traits<char> >)’:
/usr/include/pybind11/cast.h:1823:45: note: ‘SR.32267’ was declared here
 1823 |     return detail::collect_arguments<policy>(std::forward<Args>(args)...).call(derived().ptr());
      |            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1plus: all warnings being treated as errors
gmake[2]: Leaving directory '/builddir/build/BUILD/libmamba-2.0.5-build/mamba-libmamba-2.0.5/redhat-linux-build'
gmake[2]: *** [libmambapy/CMakeFiles/bindings.dir/build.make:96: libmambapy/CMakeFiles/bindings.dir/src/libmambapy/bindings/legacy.cpp.o] Error 1

mamba info / micromamba info

This is with:

pybind11-devel-2.13.6-2.fc42.x86_64
gcc-15.0.1-0.4.fc42.x86_64

Same error with the latest mamba git commit 9b6be1ce603f9df1d94fb864639ae00ad8083950

Logs

environment.yml

~/.condarc