[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 #1 from Alexander Lelyakin <alexander.lelyakin at googlemail dot com> ---
There is a shorter sequence:

g++ -std=c++20 -fmodules-ts -x c++-system-header fstream
g++ -std=c++20 -fmodules-ts -x c++-system-header string_view
g++ -std=c++20 -fmodules-ts -x c++-system-header locale
----
/usr/local/include/c++/11.0.1/locale: internal compiler error: Segmentation
fault
0x10fc36f crash_signal
        ../../gcc/gcc/toplev.c:327
0x6de73c trees_out::get_tag(tree_node*)
        ../../gcc/gcc/cp/module.cc:4898
0x6de73c trees_out::ref_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:7205
0x6de73c trees_out::ref_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:7188
0xa5c4dc trees_out::tree_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:9055
0xa5e411 trees_out::type_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:8778
0xa5c8da trees_out::tree_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:9138
0xa5e1cc trees_out::type_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:8696
0xa5c8da trees_out::tree_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:9138
0xa5e654 trees_out::type_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:8805
0xa5c8da trees_out::tree_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:9138
0xa5e1cc trees_out::type_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:8696
0xa5c8da trees_out::tree_node(tree_node*)
        ../../gcc/gcc/cp/module.cc:9138
0xa5d20f trees_out::core_vals(tree_node*)
        ../../gcc/gcc/cp/module.cc:6108
0xa5e0ec trees_out::tree_node_vals(tree_node*)
        ../../gcc/gcc/cp/module.cc:7168
0xa5e0ec trees_out::fn_parms_init(tree_node*)
        ../../gcc/gcc/cp/module.cc:10069
0xa5b086 trees_out::decl_value(tree_node*, depset*)
        ../../gcc/gcc/cp/module.cc:7765
0xa625c3 depset::hash::find_dependencies(module_state*)
        ../../gcc/gcc/cp/module.cc:13237
0xa62c28 module_state::write(elf_out*, cpp_reader*)
        ../../gcc/gcc/cp/module.cc:17652
0xa640cf finish_module_processing(cpp_reader*)
        ../../gcc/gcc/cp/module.cc:19922
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 20210228 (experimental)