Argyrios Kyrtzidis 70ec1c7e62 [PCH/preamble] Make sure that if the preamble/PCH was serialized with errors that we set diagnostic engine state appropriately. ...

Otherwise there can be a crash with CFG analysis warnings doing work on invalid AST.

Fixes crash of rdar://26224134

llvm-svn: 275313

2016-07-13 20:35:26 +00:00

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