Comment 2 for bug 1945364

Created attachment 54077
reduced testcase

Maybe related to PR107083

Compiler output:
$ x86_64-pc-linux-gnu-g++ -fmodule-header testcase.C
testcase.C: internal compiler error: in core_vals, at cp/module.cc:6262
0x7083ca trees_out::core_vals(tree_node*)
        /repo/gcc-trunk/gcc/cp/module.cc:6262
0xf3ea44 trees_out::tree_node_vals(tree_node*)
        /repo/gcc-trunk/gcc/cp/module.cc:7216
0xf3ea44 trees_out::tree_value(tree_node*)
        /repo/gcc-trunk/gcc/cp/module.cc:9081
0xf3a8b1 trees_out::tree_node(tree_node*)
        /repo/gcc-trunk/gcc/cp/module.cc:9279
0xf3bba0 trees_out::core_vals(tree_node*)
        /repo/gcc-trunk/gcc/cp/module.cc:6170
0xf3939a trees_out::tree_node_vals(tree_node*)
        /repo/gcc-trunk/gcc/cp/module.cc:7216
0xf3939a trees_out::decl_value(tree_node*, depset*)
        /repo/gcc-trunk/gcc/cp/module.cc:7795
0xf409e2 depset::hash::find_dependencies(module_state*)
        /repo/gcc-trunk/gcc/cp/module.cc:13326
0xf41171 module_state::write_begin(elf_out*, cpp_reader*, module_state_config&, unsigned int&)
        /repo/gcc-trunk/gcc/cp/module.cc:17893
0xf42574 finish_module_processing(cpp_reader*)
        /repo/gcc-trunk/gcc/cp/module.cc:20235
0xed1912 c_parse_final_cleanups()
        /repo/gcc-trunk/gcc/cp/decl2.cc:5148
0x10fd190 c_common_parse_file()
        /repo/gcc-trunk/gcc/c-family/c-opts.cc:1266
Please submit a full bug report, with preprocessed source (by using -freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.

$ x86_64-pc-linux-gnu-g++ -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest/bin/x86_64-pc-linux-gnu-g++
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-r13-4610-20221212132425-g14d0f82cab3-checking-yes-rtl-df-extra-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/13.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++ --enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra --with-cloog --with-ppl --with-isl --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu --target=x86_64-pc-linux-gnu --with-ld=/usr/bin/x86_64-pc-linux-gnu-ld --with-as=/usr/bin/x86_64-pc-linux-gnu-as --disable-libstdcxx-pch --prefix=/repo/gcc-trunk//binary-trunk-r13-4610-20221212132425-g14d0f82cab3-checking-yes-rtl-df-extra-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 13.0.0 20221212 (experimental) (GCC)