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From: "ppalka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/94808] [ICE] [Regression] Segfault during diagnostics from
 concept check failure
Date: Tue, 28 Apr 2020 12:12:26 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D94808

Patrick Palka <ppalka at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2020-04-28
             Status|UNCONFIRMED                 |ASSIGNED
     Ever confirmed|0                           |1
           Assignee|unassigned at gcc dot gnu.org      |ppalka at gcc dot g=
nu.org
                 CC|                            |ppalka at gcc dot gnu.org

--- Comment #1 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Confirmed.  Reduced testcase:

template<typename T, typename... Args>
  concept baz =3D requires (T t, Args... args) { *t; };

template<typename T>
  requires baz<T>
void foo() { }

void bar()
{
  foo<int>();
}


GCC 10 segfaults during diagnostics, GCC 9 doesn't.

Looking into it.=