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From: "dacamara.cameron at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/59673] wrong specialization used when a partial
 specialization of a member template is explicitly specialized
Date: Tue, 14 Apr 2020 23:41:04 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D59673

Cameron <dacamara.cameron at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dacamara.cameron at gmail =
dot com

--- Comment #1 from Cameron <dacamara.cameron at gmail dot com> ---
I also observe the breakage with gcc10:

struct A {
  class B { };
  template <typename>
  class C { };
};

template <typename T>
struct U {
  template <typename>
  static constexpr bool tvalue =3D false;
};

template <>
template <typename V>
constexpr bool U<A::B>::tvalue<A::C<V>> =3D true;

static_assert(U<A::B>::tvalue<A::C<int>>); // fails on gcc10.  clang10 comp=
iles
successfully.=