https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84598
Bug ID: 84598
Summary: internal compiler error: Segmentation fault
(cp_default_conversion())
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: ---
Input (I know... don't ask):
template<int b> __attribute__ a([] { class c,
__attribute__(vector_size(operator+()))) d;
Output:
$ xgcc -x c++ -std=c++14 -O3 -c -
<stdin>:1:31: error: expected '(' before 'a'
<stdin>:1:31: error: expected '(' before 'a'
<stdin>: In lambda function:
<stdin>:1:45: error: expected unqualified-id before ',' token
<stdin>:1:61: error: expected '(' before 'vector_size'
<stdin>:1:73: error: there are no arguments to 'operator+' that depend on a
template parameter, so a declaration of 'operator+' must be available
[-fpermissive]
<stdin>:1:73: note: (if you use '-fpermissive', G++ will accept your code, but
allowing the use of an undeclared name is deprecated)
<stdin>:1:88: internal compiler error: Segmentation fault
0x3138779 crash_signal
/home/vegard/git/gcc/gcc/toplev.c:325
0x13c5f60 cp_default_conversion
/home/vegard/git/gcc/gcc/cp/typeck.c:2134
0x1632c0b handle_vector_size_attribute
/home/vegard/git/gcc/gcc/c-family/c-attribs.c:3026
0x1466155 decl_attributes(tree_node**, tree_node*, int, tree_node*)
/home/vegard/git/gcc/gcc/attribs.c:670
0xbf7838 grokdeclarator(cp_declarator const*, cp_decl_specifier_seq*,
decl_context, int, tree_node**)
/home/vegard/git/gcc/gcc/cp/decl.c:10905
0xc14e88 start_decl(cp_declarator const*, cp_decl_specifier_seq*, int,
tree_node*, tree_node*, tree_node**)
/home/vegard/git/gcc/gcc/cp/decl.c:4952
0xf9cccc cp_parser_init_declarator
/home/vegard/git/gcc/gcc/cp/parser.c:19534
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
0xf26fa7 cp_parser_unary_expression
/home/vegard/git/gcc/gcc/cp/parser.c:8281
0xebcdba cp_parser_cast_expression
/home/vegard/git/gcc/gcc/cp/parser.c:9049
0xebf3e6 cp_parser_binary_expression
/home/vegard/git/gcc/gcc/cp/parser.c:9150
0xec2eba cp_parser_assignment_expression
/home/vegard/git/gcc/gcc/cp/parser.c:9437
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
Bug doesn't seem present in 7.3.
Test case reduced by C-Reduce, unfortunately I lost the original non-reduced
source.
