https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126031
Bug ID: 126031
Summary: ICE on anonymous struct declaration inside typedef
Product: gcc
Version: 17.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: s.kimura.h41104 at gmail dot com
Target Milestone: ---
Compiler Explorer: https://godbolt.org/z/onvxTxh67
Reproducer:
```
typedef struct {
struct S;
} s;
```
Backtrace:
<source>:3:3: internal compiler error: Segmentation fault
3 | } s;
| ^
0x2a1ec38 diagnostics::context::diagnostic_impl(rich_location*,
diagnostics::metadata const*, diagnostics::option_id, char const*,
__va_list_tag (*) [1], diagnostics::kind)
???:0
0x2a1387b internal_error(char const*, ...)
???:0
0xc158a0 name_unnamed_type(tree_node*, tree_node*)
???:0
0xc366d7 grokdeclarator(cp_declarator const*, cp_decl_specifier_seq*,
decl_context, int, tree_node**)
???:0
0xc38508 start_decl(cp_declarator const*, cp_decl_specifier_seq*, int,
tree_node*, tree_node*, tree_node**)
???:0
0xd89013 c_parse_file()
???:0
0xf197e9 c_common_parse_file()
???:0
This ICE goes back to gcc-16:
https://godbolt.org/z/5Ev1dM8q1
