https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84585
Bug ID: 84585
Summary: internal compiler error: in get_local_decls, at
cp/name-lookup.c:3654
Product: gcc
Version: 8.0.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: vegard.nossum at gmail dot com
Target Milestone: ---
This (invalid) program:
template <typename a> b() {[](auto = template <;{a c(auto
When compiled with:
xgcc -x c++ -std=c++14 -O3 -c -
Gives this output:
<stdin>:1:25: error: ISO C++ forbids declaration of 'b' with no type
[-fpermissive]
<stdin>: In function 'int b()':
<stdin>:1:38: error: a template declaration cannot appear at block scope
<stdin>:1:49: error: expected ')' before '{' token
<stdin>: In lambda function:
<stdin>:1:54: internal compiler error: in get_local_decls, at
cp/name-lookup.c:3654
0xe15de7 get_local_decls()
/home/vegard/git/gcc/gcc/cp/name-lookup.c:3653
0xe8421c synthesize_implicit_template_parm
/home/vegard/git/gcc/gcc/cp/parser.c:39013
0xf2b5cd cp_parser_simple_type_specifier
/home/vegard/git/gcc/gcc/cp/parser.c:16966
0xf1f5ad cp_parser_type_specifier
/home/vegard/git/gcc/gcc/cp/parser.c:16786
0xf8520a cp_parser_decl_specifier_seq
/home/vegard/git/gcc/gcc/cp/parser.c:13573
0xfb3e8d cp_parser_parameter_declaration
/home/vegard/git/gcc/gcc/cp/parser.c:21440
0xfb67da cp_parser_parameter_declaration_list
/home/vegard/git/gcc/gcc/cp/parser.c:21252
0xfb9470 cp_parser_parameter_declaration_clause
/home/vegard/git/gcc/gcc/cp/parser.c:21173
0xf555ef cp_parser_direct_declarator
/home/vegard/git/gcc/gcc/cp/parser.c:19926
0xf9b858 cp_parser_declarator
/home/vegard/git/gcc/gcc/cp/parser.c:19800
0xf9bb2e cp_parser_init_declarator
/home/vegard/git/gcc/gcc/cp/parser.c:19326
0xfa2a97 cp_parser_simple_declaration
/home/vegard/git/gcc/gcc/cp/parser.c:13009
0xfa8c88 cp_parser_block_declaration
/home/vegard/git/gcc/gcc/cp/parser.c:12827
0xfab154 cp_parser_declaration_statement
/home/vegard/git/gcc/gcc/cp/parser.c:12420
0xef6e13 cp_parser_statement
/home/vegard/git/gcc/gcc/cp/parser.c:10869
0xefb1eb cp_parser_statement_seq_opt
/home/vegard/git/gcc/gcc/cp/parser.c:11218
0xfcca31 cp_parser_lambda_body
/home/vegard/git/gcc/gcc/cp/parser.c:10632
0xfcca31 cp_parser_lambda_expression
/home/vegard/git/gcc/gcc/cp/parser.c:10137
0xf31764 cp_parser_primary_expression
/home/vegard/git/gcc/gcc/cp/parser.c:5257
0xf7373b cp_parser_postfix_expression
/home/vegard/git/gcc/gcc/cp/parser.c:7026
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.
Version:
xgcc (GCC) 8.0.1 20180204 (experimental)
built from git fdae6180ad24fa6303fa046114f3e4b66b8db34d
Versions 5.4.1 and 7.3.0 don't seem to be affected AFAICS.
Test case was reduced using C-Reduce.
I've also submitted bug #84576 which could be related.
