[Bug c++/96852] New: Missing diagnostic message for friend declaration with wrong number of template arguments.

[anders.granlund.0 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96852

            Bug ID: 96852
           Summary: Missing diagnostic message for friend declaration with
                    wrong number of template arguments.
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: anders.granlund.0 at gmail dot com
  Target Milestone: ---

Program (main.cpp):

  template<typename>
  class A
  {
  };

  class B
  {
      template<typename, typename>
      friend class ::A;
  };

  int main()
  {
  }

Compilation command line:

  g++ -std=c++17 -pedantic-errors main.cpp

Observed behaviour:

  No compilation errors.

Expected behaviour:

  Compilation error about using the wrong number of template arguments in the
  firend declaration.

Note:

  clang++ gives the expected error message.