https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94480
Bug ID: 94480
Summary: ICE in cp_parser_abort_tentative_parse, at
cp/parser.c:31858
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/CXX/expr/expr.prim/expr.prim.req/requires-expr.cpp from the clang 10.0.0
test suite, w/ -fconcepts:
template<typename T, typename U>
constexpr bool is_same_v = false;
static_assert(is_same_v<bool, decltype(requires { requires false; })>);
% g++-10.0.1 -fconcepts -c nn8nrioc.cpp
nn8nrioc.cpp:4:60: note: the expression 'false' evaluated to 'false'
4 | static_assert(is_same_v<bool, decltype(requires { requires false; })>);
| ~~~~~~~~~^~~~~
nn8nrioc.cpp:4:67: internal compiler error: in cp_parser_abort_tentative_parse,
at cp/parser.c:31858
4 | static_assert(is_same_v<bool, decltype(requires { requires false; })>);
| ^
0x63c536 cp_parser_abort_tentative_parse
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:31858
0x63c536 cp_parser_abort_tentative_parse
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:31856
0x9a9b4f cp_parser_decltype_expr
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:14832
0x9a9b4f cp_parser_decltype
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:14920
0x9b34ef cp_parser_simple_type_specifier
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:18008
0x996e45 cp_parser_type_specifier
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:17784
0x9aca80 cp_parser_type_specifier_seq
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:22385
0x9a53c7 cp_parser_type_id_1
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:22202
0x9a82e3 cp_parser_template_type_arg
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:22293
0x9acc1f cp_parser_template_argument
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:17181
0x9acc1f cp_parser_template_argument_list
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:17092
0x9acc1f cp_parser_enclosed_template_argument_list
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:29761
0x9adf60 cp_parser_template_id
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:16664
0x9ae62a cp_parser_class_name
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:23696
0x9aa385 cp_parser_qualifying_entity
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:6773
0x9aa385 cp_parser_nested_name_specifier_opt
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:6455
0x9b2f59 cp_parser_simple_type_specifier
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:18126
0x9a83ea cp_parser_postfix_expression
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:7173
0x98a669 cp_parser_binary_expression
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:9554
0x98c31e cp_parser_assignment_expression
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:9859
