Public bug reported: Issue following three commands in empty directory: -------------- g++-11 -std=c++20 -fmodules-ts -x c++-system-header iostream g++-11 -std=c++20 -fmodules-ts -x c++-system-header utility g++-11 -std=c++20 -fmodules-ts -x c++-system-header algorithm ---------------- The third command results in: ------------------------- /usr/include/c++/11/bits/iterator_concepts.h:919:54: internal compiler error: tree check: expected binding_vector, have overload in maybe_record_mergeable_decl, at cp/name-lookup.c:3562 919 | operator==(unreachable_sentinel_t, const _It&) noexcept | ^~~~~~~~ 0xe33760 tree_check_failed(tree_node const*, char const*, int, char const*, ...) ../../src/gcc/tree.c:9814 0xbfb767 tree_check(tree_node*, char const*, int, char const*, tree_code) ../../src/gcc/tree.h:3349 0xbfb767 maybe_record_mergeable_decl ../../src/gcc/cp/name-lookup.c:3562 0x5ea899 do_pushdecl ../../src/gcc/cp/name-lookup.c:3864 0x12d067d do_pushdecl_with_scope ../../src/gcc/cp/name-lookup.c:4886 0x12d2fc7 pushdecl_namespace_level(tree_node*, bool) ../../src/gcc/cp/name-lookup.c:6250 0x14328dc push_template_decl(tree_node*, bool) ../../src/gcc/cp/pt.c:6052 0x192e00e do_friend(tree_node*, tree_node*, tree_node*, tree_node*, overload_flags, bool) ../../src/gcc/cp/friend.c:608 0x134810d grokdeclarator(cp_declarator const*, cp_decl_specifier_seq*, decl_context, int, tree_node**) ../../src/gcc/cp/decl.c:13600 0x13a4d39 grokmethod(cp_decl_specifier_seq*, cp_declarator const*, tree_node*) ../../src/gcc/cp/decl.c:17476 0x13a4450 cp_parser_save_member_function_body ../../src/gcc/cp/parser.c:30580 0x133881c cp_parser_init_declarator ../../src/gcc/cp/parser.c:21557 0x140decf cp_parser_single_declaration ../../src/gcc/cp/parser.c:30434 0x762047 cp_parser_template_declaration_after_parameters ../../src/gcc/cp/parser.c:30006 0x7543ea cp_parser_explicit_template_declaration ../../src/gcc/cp/parser.c:30272 0x1342784 cp_parser_member_specification_opt ../../src/gcc/cp/parser.c:25734 0x1342784 cp_parser_class_specifier_1 ../../src/gcc/cp/parser.c:24818 0x13334c0 cp_parser_class_specifier ../../src/gcc/cp/parser.c:25128 0x13334c0 cp_parser_type_specifier ../../src/gcc/cp/parser.c:18381 0x1331cee cp_parser_decl_specifier_seq ../../src/gcc/cp/parser.c:15003 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report. See <file:///usr/share/doc/gcc-11/README.Bugs> for instructions. ---------------------- g++-11 (Ubuntu 11-20210203-0ubuntu1) 11.0.0 20210203 (experimental) [master revision e8c87bc07b5:def4749fcba:84110515b93a6709de24240d6658ac207db5129f] 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.
** Affects: gcc-11 (Ubuntu) Importance: Undecided Status: New ** Tags: c++20 modules -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1915640 Title: internal compiler error while compiling system headers as modules To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gcc-11/+bug/1915640/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs