[Bug c++/99238] [modules] internal compiler error: segmentation fault

[alexander.lelyakin at googlemail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99238

--- Comment #3 from Alexander Lelyakin <alexander.lelyakin at googlemail dot com> ---
About half of sequences of headers producing segmentation fault are stopped on
<stop_token>.
However there are another variants:
----
g++ -std=c++20 -fmodules-ts -x c++-system-header stdexcept
g++ -std=c++20 -fmodules-ts -x c++-system-header locale
----
/usr/local/include/c++/11.0.1/locale: internal compiler error: Segmentation
fault
0x10fee8f crash_signal
        ../../gcc/gcc/toplev.c:327
0x6deab8 trees_out::get_tag(tree_node*)
        ../../gcc/gcc/cp/module.cc:4783
0x6deab8 trees_out::ref_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:7090
0x6deab8 trees_out::ref_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:7073
0xa5dfdc trees_out::tree_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:8978
0xa5fec9 trees_out::type_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:8701
0xa5e3da trees_out::tree_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:9061
0xa5fccc trees_out::type_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:8619
0xa5e3da trees_out::tree_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:9061
0xa60104 trees_out::type_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:8728
0xa5e3da trees_out::tree_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:9061
0xa5ed0f trees_out::core_vals(tree_node*)
        ../../gcc/gcc/cp/module.cc:5993
0xa5fbec trees_out::tree_node_vals(tree_node*)
        ../../gcc/gcc/cp/module.cc:7053
0xa5fbec trees_out::fn_parms_init(tree_node*)
        ../../gcc/gcc/cp/module.cc:9992
0xa5c4c4 trees_out::decl_value(tree_node*, depset*)
        ../../gcc/gcc/cp/module.cc:7625
0xa63fd1 depset::hash::find_dependencies(module_state*)
        ../../gcc/gcc/cp/module.cc:13169
0xa64668 module_state::write(elf_out*, cpp_reader*)
        ../../gcc/gcc/cp/module.cc:17644
0xa65aff finish_module_processing(cpp_reader*)
        ../../gcc/gcc/cp/module.cc:19884
0x9f901b c_parse_final_cleanups()
        ../../gcc/gcc/cp/decl2.c:5175
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
----
g++ (GCC) 11.0.1 20210308 (experimental)
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