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-rw-r--r--lib/Serialization/ASTReader.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/Serialization/ASTReader.cpp b/lib/Serialization/ASTReader.cpp
index 4c11f38395..24073df3ec 100644
--- a/lib/Serialization/ASTReader.cpp
+++ b/lib/Serialization/ASTReader.cpp
@@ -538,7 +538,7 @@ IdentifierInfo *ASTIdentifierLookupTrait::ReadData(const internal_key_type& k,
// Set or check the various bits in the IdentifierInfo structure.
// Token IDs are read-only.
- if (HasRevertedTokenIDToIdentifier)
+ if (HasRevertedTokenIDToIdentifier && II->getTokenID() != tok::identifier)
II->RevertTokenIDToIdentifier();
II->setObjCOrBuiltinID(ObjCOrBuiltinID);
assert(II->isExtensionToken() == ExtensionToken &&