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-rw-r--r--clang/lib/Sema/SemaCodeComplete.cpp5
1 files changed, 5 insertions, 0 deletions
diff --git a/clang/lib/Sema/SemaCodeComplete.cpp b/clang/lib/Sema/SemaCodeComplete.cpp
index 2412d919ec9..8d953308d81 100644
--- a/clang/lib/Sema/SemaCodeComplete.cpp
+++ b/clang/lib/Sema/SemaCodeComplete.cpp
@@ -2605,6 +2605,11 @@ static std::string
FormatFunctionParameter(const PrintingPolicy &Policy, const ParmVarDecl *Param,
bool SuppressName = false, bool SuppressBlock = false,
Optional<ArrayRef<QualType>> ObjCSubsts = None) {
+ // Params are unavailable in FunctionTypeLoc if the FunctionType is invalid.
+ // It would be better to pass in the param Type, which is usually avaliable.
+ // But this case is rare, so just pretend we fell back to int as elsewhere.
+ if (!Param)
+ return "int";
bool ObjCMethodParam = isa<ObjCMethodDecl>(Param->getDeclContext());
if (Param->getType()->isDependentType() ||
!Param->getType()->isBlockPointerType()) {
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