https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103927
Bug ID: 103927
Summary: ICE in a recursive class template
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: fchelnokov at gmail dot com
Target Milestone: ---
This program
```
template<auto>
struct A{};
template<int N, class T = A<[]{}>>
struct B : B<N-1> {};
template<class T>
struct B<0,T> {};
B<1, int> x;
```
is accepted by Clang but produces Internal Compiler Error in GCC.
Demo: https://gcc.godbolt.org/z/z5aGj9ovr
