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-rw-r--r--lib/Serialization/ASTWriter.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/Serialization/ASTWriter.cpp b/lib/Serialization/ASTWriter.cpp
index c6129d326cb67..f7a49e41009d7 100644
--- a/lib/Serialization/ASTWriter.cpp
+++ b/lib/Serialization/ASTWriter.cpp
@@ -1462,7 +1462,7 @@ void ASTWriter::WriteControlBlock(Preprocessor &PP, ASTContext &Context,
}
// Module map file
- if (WritingModule) {
+ if (WritingModule && WritingModule->Kind == Module::ModuleMapModule) {
Record.clear();
auto &Map = PP.getHeaderSearchInfo().getModuleMap();