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From: "bruck.michael at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/96097] New: ICE in dependent_type_p, at cp/pt.c:26326
Date: Tue, 07 Jul 2020 16:21:52 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96097

            Bug ID: 96097
           Summary: ICE in dependent_type_p, at cp/pt.c:26326
           Product: gcc
           Version: 10.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: bruck.michael at gmail dot com
  Target Milestone: ---

https://gcc.godbolt.org/z/WVUAy5

Same error location as PR95931, but very different test case with valid code
(probably).

<source>: In function 'void test()':
<source>:17:22: internal compiler error: in dependent_type_p, at cp/pt.c:26=
343
   17 |     func<Y<X, 0>, Y>();
      |                      ^

Fails with -std=3Dc++17 at least since gcc5.1

---
template <
    typename A,
    template <typename T, typename T::typeX> typename TA>
auto func()
{
    return TA<typename A::typeY, 0>{};
}

struct X { using typeX =3D int; };

template <typename T, int>
// template <typename T, typename T::typeX>  // works
struct Y { using typeY =3D T; };

void test()
{
    func<Y<X, 0>, Y>();
}
---=