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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/99642] Compiler error while using precompiled header and
 -Wmismatched-tags flag
Date: Thu, 18 Mar 2021 14:23:03 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99642

Martin Sebor <msebor at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |ice-on-valid-code
             Status|UNCONFIRMED                 |NEW
                 CC|                            |msebor at gcc dot gnu.org
   Last reconfirmed|                            |2021-03-18
     Ever confirmed|0                           |1

--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed.  The assert below fails:

      /* For implicit instantiations of a primary template look up
         the primary or partial specialization and use it as
         the expected class-key rather than using the class-key of
         the first reference to the instantiation.  The primary must
         be (and inevitably is) at index zero.  */
      tree spec =3D specialization_of (type);
      cdlguide =3D class2loc.get (spec);
      gcc_assert (cdlguide !=3D NULL);=