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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/102036] New: -Wmismatched-tags doesn't warn for explicit
 instantations
Date: Tue, 24 Aug 2021 11:30:51 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102036

            Bug ID: 102036
           Summary: -Wmismatched-tags doesn't warn for explicit
                    instantations
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Keywords: diagnostic
          Severity: enhancement
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: redi at gcc dot gnu.org
                CC: msebor at gcc dot gnu.org
  Target Milestone: ---

Clang gives a -Wmismatched-tags warning about this, but GCC doesn't:

template<typename T> struct X { };
template class X<int>;=