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gcc-9.2.0
author anatofuz
date Thu, 13 Feb 2020 11:34:05 +0900
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// PR c++/84551
// { dg-do compile { target c++2a } }
// { dg-additional-options "-g -O" }

template<typename> concept C = true;

template<template<typename T> requires C<T> class TT> struct A {};

template<typename U> requires true struct B {};

A<B> a;				// { dg-error "" }