升级到最新的Visual Studio 2022版本17.6后，我们的一个自定义视图停止被识别为std::ranges::range。结果发现问题出在视图的迭代器中同时存在operator ==和operator !=。
请在下面找到最小的简化示例（已经没有视图和迭代器）：

struct A {
    friend bool operator ==( const A &, const A & ) = default;
};

struct B {
    friend bool operator ==( const B &, const B & ) = default;
    friend bool operator ==( const B &, const A & ) { return false; }
    // Visual Studio 2022 version 17.6 does not like next line
    friend bool operator !=( const B &, const A & ) { return true; }
};

template< class T, class U >
concept comparable =
  requires(const std::remove_reference_t<T>& t,
           const std::remove_reference_t<U>& u) {
    { t == u } -> std::same_as<bool>;
    { t != u } -> std::same_as<bool>;
    { u == t } -> std::same_as<bool>;
    { u != t } -> std::same_as<bool>;
  };
  
// ok in GCC, Clang and Visual Studio before version 17.6
static_assert( comparable<A, B> );

GCC和Clang接受该示例，但不接受最新的Visual Studio，它会打印错误：

<source>(25): error C2607: static assertion failed
<source>(25): note: the concept 'comparable<A,B>' evaluated to false
<source>(18): note: 'bool operator ==(const B &,const A &)': rewritten candidate function was excluded from overload resolution because a corresponding operator!= declared in the same scope
<source>(4): note: could be 'bool operator ==(const A &,const A &)' [found using argument-dependent lookup]
<source>(8): note: or       'bool operator ==(const B &,const B &)' [found using argument-dependent lookup]
<source>(9): note: or       'bool operator ==(const B &,const A &)' [found using argument-dependent lookup]
<source>(4): note: or 'bool operator ==(const A &,const A &)' [synthesized expression 'y == x']
<source>(8): note: or 'bool operator ==(const B &,const B &)' [synthesized expression 'y == x']
<source>(9): note: or 'bool operator ==(const B &,const A &)' [synthesized expression 'y == x']
<source>(18): note: 'bool operator ==(const B &,const A &)': rewritten candidate function was excluded from overload resolution because a corresponding operator!= declared in the same scope
<source>(18): note: while trying to match the argument list '(const A, const B)'

在线演示：https://gcc.godbolt.org/z/evTfofq3d
这是新的Visual Studio编译器中的一个错误，还是相反，其他人错了？