[Bug c++/116913] [15 regression] ICE when building firefox-130.0.1 (tree check: expected var_decl or function_decl or field_decl or type_decl or concept_decl or template_decl, have using_decl in cp_parser_alias_declaration, at cp/parser.cc:22826)

[sjames at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116913

--- Comment #3 from Sam James <sjames at gcc dot gnu.org> ---
Not sure if this is a good reduction but:
```
namespace gfx {
typedef int MarginDouble;
}
using gfx::MarginDouble;
using MarginDouble = MarginDouble;
```