<tr1/hashtable> header, where a friend class template
std::tr1::__detail::_Map_base is declared with the wrong template
parameters. GCC doesn't catch the problem, so Clang does a little
back-flip to avoid diagnosing just this one instance of the problem.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@100790 91177308-0d34-0410-b5e6-96231b3b80d8
Douglas Gregor