https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97103
Bug ID: 97103
Summary: ICE on nested requires expression template template
instantiation
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: mateusz.pusz at gmail dot com
Target Milestone: ---
```
template<typename R, typename Rep = double>
class quantity {};
template<template<typename, typename> typename Q>
inline constexpr bool valid_template_arguments = requires {
requires requires { typename Q<int, int>; };
};
static_assert(valid_template_arguments<quantity>);
```
Might be related to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66564.
