If we run into multiple errors within the same template instantiation,
only print the template instantiation backtrace for the first error.

Also, if a base class has failed to type-check during instantiation,
just drop that base class and continue on to check other base classes.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@66563 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed