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-rw-r--r--clang/lib/Serialization/ASTWriter.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/clang/lib/Serialization/ASTWriter.cpp b/clang/lib/Serialization/ASTWriter.cpp
index 9714893418e..9fe83234a1a 100644
--- a/clang/lib/Serialization/ASTWriter.cpp
+++ b/clang/lib/Serialization/ASTWriter.cpp
@@ -2050,7 +2050,7 @@ void ASTWriter::WritePreprocessor(const Preprocessor &PP, bool IsModule) {
// If the macro or identifier need no updates, don't write the macro history
// for this one.
// FIXME: Chain the macro history instead of re-writing it.
- if (MD->isFromPCH() &&
+ if (MD && MD->isFromPCH() &&
Name->isFromAST() && !Name->hasChangedSinceDeserialization())
continue;
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