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-rw-r--r--clang/lib/Serialization/ASTWriter.cpp4
1 files changed, 4 insertions, 0 deletions
diff --git a/clang/lib/Serialization/ASTWriter.cpp b/clang/lib/Serialization/ASTWriter.cpp
index 52cf3829dc9..7582d1a4502 100644
--- a/clang/lib/Serialization/ASTWriter.cpp
+++ b/clang/lib/Serialization/ASTWriter.cpp
@@ -316,6 +316,10 @@ ASTTypeWriter::VisitDependentTemplateSpecializationType(
void ASTTypeWriter::VisitPackExpansionType(const PackExpansionType *T) {
Writer.AddTypeRef(T->getPattern(), Record);
+ if (llvm::Optional<unsigned> NumExpansions = T->getNumExpansions())
+ Record.push_back(*NumExpansions + 1);
+ else
+ Record.push_back(0);
Code = TYPE_PACK_EXPANSION;
}
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