https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114901
Bug ID: 114901
Summary: GCC internal_error on CTAD alias
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: hokein.wu at gmail dot com
Target Milestone: ---
GCC (trunk) crashes on the following code:
https://godbolt.org/z/43Tqf4qs9
```
template <class D>
constexpr bool C = sizeof(D);
template <typename U>
struct T {
template<typename V, typename N>
struct Foo {
Foo(V, N);
};
template<typename X, typename N>
requires (C<N>) // removes the require-clause will make the crash disappear
Foo(X, N) -> Foo<X, N>;
template <typename Y, typename Y2, int N = sizeof(Y2)>
using AFoo = Foo<decltype(N), Y2>;
};
T<double>::AFoo s{1, 2};
```
