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From: "tim at klingt dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/105725] [ICE] segfault with `-Wmismatched-tags`
Date: Wed, 25 May 2022 08:38:09 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105725

--- Comment #1 from tim blechmann <tim at klingt dot org> ---
it also ICEs on valid code:

```
template <bool> struct enable_if;
template <bool _Cond> using enable_if_t =3D typename enable_if<_Cond>::type;
template <typename> bool is_class_v;
template <class, class> bool IsPrivateSignalArg;
template <class T>
bool IsPrivateSignalArg<T, enable_if_t<is_class_v<class T::QPrivateSignal>>=
>;
```=