https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94481
Bug ID: 94481
Summary: ICE: Segmentation fault (in
cp_parser_placeholder_type_specifier)
Product: gcc
Version: 10.0
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++-10.0.1-alpha20200329 snapshot (g:60c254b279e8e8443b8ad26cc46b9e4084cff66c)
ICEs when compiling the following testcase, extracted from
test/Parser/cxx2a-placeholder-type-constraint.cpp from the clang 10.0.0 test
suite, w/ -std=c++2a:
template<typename T, typename U=void>
concept C = true;
void foo() {
C decltype a19 = 1;
}
% g++-10.0.1 -std=c++2a -c siabxbp8.cpp
siabxbp8.cpp: In function 'void foo()':
siabxbp8.cpp:5:5: internal compiler error: Segmentation fault
5 | C decltype a19 = 1;
| ^~~~~~~~
0xfe238f crash_signal
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/toplev.c:328
0x980d5d cp_parser_placeholder_type_specifier
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:18381
0x9b39d7 cp_parser_simple_type_specifier
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:18247
0x996e45 cp_parser_type_specifier
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:17784
0x997fb5 cp_parser_decl_specifier_seq
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:14356
0x998a54 cp_parser_simple_declaration
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:13610
0x99a8fa cp_parser_declaration_statement
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:13163
0x99b56f cp_parser_statement
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:11469
0x99c4d8 cp_parser_statement_seq_opt
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:11835
0x99c5b8 cp_parser_compound_statement
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:11785
0x9b4855 cp_parser_function_body
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:23062
0x9b4855 cp_parser_ctor_initializer_opt_and_function_body
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:23113
0x9b7cf6 cp_parser_function_definition_after_declarator
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:28988
0x9b8d89 cp_parser_function_definition_from_specifiers_and_declarator
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:28904
0x9b8d89 cp_parser_init_declarator
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:20669
0x998b56 cp_parser_simple_declaration
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:13731
0x9c3302 cp_parser_declaration
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:13430
0x9c3a9f cp_parser_translation_unit
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:4731
0x9c3a9f c_parse_file()
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:43944
0xadbadb c_common_parse_file()
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/c-family/c-opts.c:1186
