https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103078
Bug ID: 103078
Summary: ICE canonical types differ for identical types since
r12-1822-gf9c80eb12c58126a
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: polacek at redhat dot com
Target Milestone: ---
Seen when building LLVM with GCC master:
$ cat barrier.ii
template <typename> struct __noexcept_move_assign_container;
template <class _Allocator> struct basic_string {
basic_string &operator=(basic_string &&) noexcept(
__noexcept_move_assign_container<_Allocator>::value);
basic_string &assign(basic_string &&) noexcept(
__noexcept_move_assign_container<_Allocator>::value);
};
template <class _Allocator>
basic_string<_Allocator> &
basic_string<_Allocator>::operator=(basic_string &&) noexcept(
__noexcept_move_assign_container<_Allocator>::value) {}
$ g++ barrier.ii -c -std=c++2a
barrier.ii:11:56: internal compiler error: canonical types differ for identical
types ‘basic_string<_Allocator>&
(basic_string<_Allocator>::)(basic_string<_Allocator>&&) noexcept
(__noexcept_move_assign_container<_Allocator>::value)’ and
‘basic_string<_Allocator>&
(basic_string<_Allocator>::)(basic_string<_Allocator>&&) noexcept
(__noexcept_move_assign_container<_Allocator>::value)’
11 | __noexcept_move_assign_container<_Allocator>::value) {}
| ^
0xc2c9b1 comptypes(tree_node*, tree_node*, int)
/home/marxin/Programming/gcc/gcc/cp/typeck.c:1558
0xa5abff duplicate_decls(tree_node*, tree_node*, bool, bool)
/home/marxin/Programming/gcc/gcc/cp/decl.c:2406
0xa63362 grokfndecl
/home/marxin/Programming/gcc/gcc/cp/decl.c:10368
0xa69ecb grokdeclarator(cp_declarator const*, cp_decl_specifier_seq*,
decl_context, int, tree_node**)
/home/marxin/Programming/gcc/gcc/cp/decl.c:14147
0xa6cb9a start_function(cp_decl_specifier_seq*, cp_declarator const*,
tree_node*)
/home/marxin/Programming/gcc/gcc/cp/decl.c:17164
0xb6cf6f cp_parser_function_definition_from_specifiers_and_declarator
/home/marxin/Programming/gcc/gcc/cp/parser.c:30969
0xb6cf6f cp_parser_init_declarator
/home/marxin/Programming/gcc/gcc/cp/parser.c:22450
0xb75014 cp_parser_single_declaration
/home/marxin/Programming/gcc/gcc/cp/parser.c:31600
0xb751a1 cp_parser_template_declaration_after_parameters
/home/marxin/Programming/gcc/gcc/cp/parser.c:31165
0xb759cc cp_parser_explicit_template_declaration
/home/marxin/Programming/gcc/gcc/cp/parser.c:31431
0xb784ed cp_parser_declaration
/home/marxin/Programming/gcc/gcc/cp/parser.c:14773
0xb7906b cp_parser_toplevel_declaration
/home/marxin/Programming/gcc/gcc/cp/parser.c:14863
0xb7906b cp_parser_translation_unit
/home/marxin/Programming/gcc/gcc/cp/parser.c:4987
0xb7906b c_parse_file()
/home/marxin/Programming/gcc/gcc/cp/parser.c:47840
0xcb3cf9 c_common_parse_file()
/home/marxin/Programming/gcc/gcc/c-family/c-opts.c:1237
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.
