https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99240
--- 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 cmath
g++ -std=c++20 -fmodules-ts -x c++-system-header random
----
/usr/local/include/c++/11.0.1/random: internal compiler error: in
get_merge_kind, at cp/module.cc:10171
0x6dccf5 trees_out::get_merge_kind(tree_node*, depset*)
../../gcc/gcc/cp/module.cc:10171
0xa5a753 trees_out::decl_value(tree_node*, depset*)
../../gcc/gcc/cp/module.cc:7631
0xa5b6ab trees_out::decl_node(tree_node*, walk_kind)
../../gcc/gcc/cp/module.cc:8626
0xa5c6a2 trees_out::tree_node(tree_node*)
../../gcc/gcc/cp/module.cc:9181
0xa61ff3 module_state::write_pendings(elf_out*, vec<depset*, va_heap, vl_ptr>,
depset::hash&, unsigned int, unsigned int*)
../../gcc/gcc/cp/module.cc:15419
0xa639f4 module_state::write(elf_out*, cpp_reader*)
../../gcc/gcc/cp/module.cc:17810
0xa640cf finish_module_processing(cpp_reader*)
../../gcc/gcc/cp/module.cc:19922
0x9f776b 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 20210228 (experimental)
Copyright (C) 2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
