https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114784
--- Comment #5 from Daniel Bertalan <dani at danielbertalan dot dev> ---
I tried Jakub's patch (thank you for the super quick response!), it crashes if
the constructor has non-type template parameters:
template <typename> struct SpanImpl {
template <long> SpanImpl();
};
template <typename T> struct Span : SpanImpl<T> {
using SpanImpl<T>::SpanImpl;
};
Span<char> c = {};
$ g++ -std=c++20 crash.cpp
crash.cpp: In instantiation of 'struct Span<char>':
crash.cpp:8:12: required from here
8 | Span<char> c = {};
| ^
crash.cpp:5:22: internal compiler error: tree check: expected function_decl,
have template_decl in implicitly_declare_fn, at cp/method.cc:3313
5 | using SpanImpl<T>::SpanImpl;
| ^~~~~~~~
