https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99242
--- Comment #1 from Alexander Lelyakin <alexander.lelyakin at googlemail dot
com> ---
There is a shorter sequence:
/usr/local/bin/g++ -std=c++20 -fmodules-ts -x c++-system-header stdexcept
/usr/local/bin/g++ -std=c++20 -fmodules-ts -x c++-system-header atomic
/usr/local/bin/g++ -std=c++20 -fmodules-ts -x c++-system-header semaphore
/usr/local/bin/g++ -std=c++20 -fmodules-ts -x c++-system-header
condition_variable
----
In file included from /usr/local/include/c++/11.0.1/condition_variable:47:
/usr/local/include/c++/11.0.1/stop_token:83:29: internal compiler error: in
lookup_mark, at cp/tree.c:2403
83 | swap(stop_token& __rhs) noexcept
| ^~~~~~~~
0x73cce0 lookup_mark(tree_node*, bool)
../../gcc/gcc/cp/tree.c:2403
0xa81c51 name_lookup::dedup(bool)
../../gcc/gcc/cp/name-lookup.c:482
0xa81c51 name_lookup::dedup(bool)
../../gcc/gcc/cp/name-lookup.c:477
0xa81c51 name_lookup::search_namespace_only(tree_node*)
../../gcc/gcc/cp/name-lookup.c:958
0xa831bb name_lookup::search_unqualified(tree_node*, cp_binding_level*)
../../gcc/gcc/cp/name-lookup.c:1158
0xa85eb4 lookup_name_1
../../gcc/gcc/cp/name-lookup.c:7804
0xa860c4 lookup_name(tree_node*, LOOK_where, LOOK_want)
../../gcc/gcc/cp/name-lookup.c:7824
0xa860c4 lookup_name(tree_node*)
../../gcc/gcc/cp/name-lookup.c:7832
0x9f2eca find_last_decl
../../gcc/gcc/cp/decl2.c:1509
0x9f2eca cplus_decl_attributes(tree_node**, tree_node*, int)
../../gcc/gcc/cp/decl2.c:1595
0x9d4b8c grokfndecl
../../gcc/gcc/cp/decl.c:10061
0x9dcddd grokdeclarator(cp_declarator const*, cp_decl_specifier_seq*,
decl_context, int, tree_node**)
../../gcc/gcc/cp/decl.c:13579
0x9e9be8 grokmethod(cp_decl_specifier_seq*, cp_declarator const*, tree_node*)
../../gcc/gcc/cp/decl.c:17564
0xa9aa68 cp_parser_save_member_function_body
../../gcc/gcc/cp/parser.c:30663
0xad7a8a cp_parser_member_declaration
../../gcc/gcc/cp/parser.c:26326
0xaa7998 cp_parser_member_specification_opt
../../gcc/gcc/cp/parser.c:25799
0xaa7998 cp_parser_class_specifier_1
../../gcc/gcc/cp/parser.c:24877
0xaa9ec3 cp_parser_class_specifier
../../gcc/gcc/cp/parser.c:25193
0xaa9ec3 cp_parser_type_specifier
../../gcc/gcc/cp/parser.c:18440
0xaaae59 cp_parser_decl_specifier_seq
../../gcc/gcc/cp/parser.c:15062
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 20210326 (experimental)
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