https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117106
--- Comment #1 from Fedor Chelnokov <fchelnokov at gmail dot com> ---
This crash is reproducible in C++20 mode as well without deducing this:
```
struct A {
int x;
void foo(this auto &&self) noexcept(noexcept(self.x)) {}
auto bar() -> decltype(foo()) {}
};
```
In instantiation of 'void A::foo() [with <template-parameter-1-1> = int]':
<source>:5:36: required from here
5 | auto bar() -> decltype(foo<int>()) {}
| ~~~~~~~~^~
<source>:4:10: internal compiler error: Segmentation fault
4 | void foo() noexcept(noexcept(x)) {}
| ^~~
0x2031cbc internal_error(char const*, ...)
???:0
0x11fb4f4 check_qualified_type(tree_node const*, tree_node const*, int)
???:0
0x11fb5f3 get_qualified_type(tree_node*, int)
???:0
0x1206345 build_qualified_type(tree_node*, int)
???:0
0x843cba build_noexcept_spec(tree_node*, int)
???:0
0x9301e1 maybe_instantiate_noexcept(tree_node*, int)
???:0
0x83311a mark_used(tree_node*, int)
???:0
0x79d629 build_new_method_call(tree_node*, tree_node*, vec<tree_node*, va_gc,
vl_embed>**, tree_node*, int, tree_node**, int)
???:0
0x960c3c finish_call_expr(tree_node*, vec<tree_node*, va_gc, vl_embed>**, bool,
bool, int)
???:0
0x90ee14 c_parse_file()
???:0
0xa0d1b9 c_common_parse_file()
???:0
Online demo: https://gcc.godbolt.org/z/PW6sn8Tjq
