https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97881
Bug ID: 97881
Summary: [11 Regression] ICE in warn_about_ambiguous_parse, at
cp/parser.c:20800
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Keywords: ice-on-invalid-code
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
g++-11.0.0-alpha20201115 snapshot (g:c746fc40f4ec8cfc1092efd49d567751858d2099)
ICEs when compiling the following testcase, reduced from test/Sema/atomic-ops.c
from the clang 10.0.1 test suite:
void
cb ()
{
volatile _Atomic (int) a1;
}
% g++-11.0.0 -c s10c4xmn.c
s10c4xmn.c: In function 'void a1()':
s10c4xmn.c:4:24: internal compiler error: in warn_about_ambiguous_parse, at
cp/parser.c:20800
4 | volatile _Atomic (int) cb;
| ^
0x663c63 warn_about_ambiguous_parse
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201115/work/gcc-11-20201115/gcc/cp/parser.c:20800
0x9fb8b9 cp_parser_init_declarator
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201115/work/gcc-11-20201115/gcc/cp/parser.c:21084
0x9d9676 cp_parser_simple_declaration
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201115/work/gcc-11-20201115/gcc/cp/parser.c:13943
0x9f654d cp_parser_declaration_statement
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201115/work/gcc-11-20201115/gcc/cp/parser.c:13342
0x9db49f cp_parser_statement
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201115/work/gcc-11-20201115/gcc/cp/parser.c:11588
0x9dc57d cp_parser_statement_seq_opt
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201115/work/gcc-11-20201115/gcc/cp/parser.c:11954
0x9dc658 cp_parser_compound_statement
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201115/work/gcc-11-20201115/gcc/cp/parser.c:11904
0x9f66c4 cp_parser_function_body
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201115/work/gcc-11-20201115/gcc/cp/parser.c:23551
0x9f66c4 cp_parser_ctor_initializer_opt_and_function_body
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201115/work/gcc-11-20201115/gcc/cp/parser.c:23602
0x9fb199 cp_parser_function_definition_after_declarator
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201115/work/gcc-11-20201115/gcc/cp/parser.c:29492
0x9fc529 cp_parser_function_definition_from_specifiers_and_declarator
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201115/work/gcc-11-20201115/gcc/cp/parser.c:29408
0x9fc529 cp_parser_init_declarator
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201115/work/gcc-11-20201115/gcc/cp/parser.c:21124
0x9d9676 cp_parser_simple_declaration
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201115/work/gcc-11-20201115/gcc/cp/parser.c:13943
0xa06564 cp_parser_declaration
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201115/work/gcc-11-20201115/gcc/cp/parser.c:13640
0xa06f19 cp_parser_translation_unit
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201115/work/gcc-11-20201115/gcc/cp/parser.c:4806
0xa06f19 c_parse_file()
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201115/work/gcc-11-20201115/gcc/cp/parser.c:44595
0xb2aa0d c_common_parse_file()
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201115/work/gcc-11-20201115/gcc/c-family/c-opts.c:1196
