It turns out that we *can* end up having to display template argument

bindings when the template argument is still an expression; it happens
while checking the template arguments of a class template partial
specializations. Fixes PR6964.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102595 91177308-0d34-0410-b5e6-96231b3b80d8