https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100055
Bug ID: 100055
Summary: ICE on invalid requires expression
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ldalessandro at gmail dot com
Target Milestone: ---
The following invalid code triggers a segfault.
```
void foo(auto&& arg) requires({});
<source>:1:30: error: statement-expressions are not allowed outside functions
nor in template-argument lists
1 | void foo(auto&& arg) requires({});
| ^
<source>:1:33: internal compiler error: Segmentation fault
1 | void foo(auto&& arg) requires({});
| ^
0x1d01009 internal_error(char const*, ...)
???:0
0x7a1b17 grokdeclarator(cp_declarator const*, cp_decl_specifier_seq*,
decl_context, int, tree_node**)
???:0
0x7a7a78 start_decl(cp_declarator const*, cp_decl_specifier_seq*, int,
tree_node*, tree_node*, tree_node**)
???:0
0x8e230d c_parse_file()
???:0
0xa615b2 c_common_parse_file()
???:0
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.
ASM generation compiler returned: 1
```
live example: https://godbolt.org/z/qjWWWchjo
