[Bug c++/11697] New: Failure to diagnose class template redeclaration via using declaration

["dgregor at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11697

           Summary: Failure to diagnose class template redeclaration via
                    using declaration
           Product: gcc
           Version: 3.4
            Status: UNCONFIRMED
          Keywords: accepts-invalid
          Severity: minor
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: dgregor at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: powerpc-apple-darwin6.6
  GCC host triplet: powerpc-apple-darwin6.6
GCC target triplet: powerpc-apple-darwin6.6

The following program should not compile, because 'A' is being redeclared in namespace foo via 
the using declaration (it has already been declared differently in namespace foo):

namespace foo {
  template<typename T>
  struct A {};
}

namespace bar {
  template<typename T>
  struct A {};
}

namespace foo {
  using bar::A;
}