https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94484
Bug ID: 94484
Summary: [10 Regression] ICE in cp_finish_decl, at
cp/decl.c:7447
Product: gcc
Version: unknown
Status: UNCONFIRMED
Keywords: error-recovery, 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/SemaTemplate/dependent-expr.cpp from the clang 10.0.0 test suite, w/
-fconcepts or -fconcepts-ts:
void i(auto a) {
[](auto a, int = ({decltype(a) i; i * 2;})){}(a);
}
% g++-10.0.1 -fconcepts-ts -c bdtktvea.cpp
bdtktvea.cpp: In function 'void i(auto:1)':
bdtktvea.cpp:2:34: error: non-function 'i' declared as implicit template
2 | [](auto a, int = ({decltype(a) i; i * 2;})){}(a);
| ^
bdtktvea.cpp:2:34: internal compiler error: in cp_finish_decl, at
cp/decl.c:7447
0x614650 cp_finish_decl(tree_node*, tree_node*, bool, tree_node*, int)
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/decl.c:7447
0x9b878b cp_parser_init_declarator
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:20909
0x998b56 cp_parser_simple_declaration
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:13731
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
0x99eed8 cp_parser_statement_expr
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:4931
0x99eed8 cp_parser_primary_expression
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:5336
0x9a8487 cp_parser_postfix_expression
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:7257
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
0x98b005 cp_parser_constant_expression
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:10153
0x98b7a1 cp_parser_initializer_clause
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:23218
0x98fe5f cp_parser_initializer
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:23156
0x9b58d9 cp_parser_default_argument
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:23037
0x9b58d9 cp_parser_parameter_declaration
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:22930
0x9b600a cp_parser_parameter_declaration_list
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:22587
0x9b641c cp_parser_parameter_declaration_clause
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:22514
0x9b6e5c cp_parser_lambda_declarator_opt
/var/tmp/portage/sys-devel/gcc-10.0.1_alpha20200329/work/gcc-10-20200329/gcc/cp/parser.c:11047
