Without "-pedantic" the following invalid code snippet is accepted
since gcc 3.4.0:

================================
template<typename> struct A
{
    typedef int A::template X;
};
================================

-- 
           Summary: [3.4/4.0 regression] Invalid template in typedef
                    accepted
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Keywords: accepts-invalid
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: reichelt at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19396

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