Teach DelayedDiagnostic to copy its string, rather than hope that the
string itself lives longer than the DelayedDiagnostic. Fixes a recent
use-after-free regression due to my availability attribute work. 


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@128148 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed