1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Sema/SemaOverload.cpp b/lib/Sema/SemaOverload.cpp
index 29ba34479daba..782c377e32025 100644
--- a/lib/Sema/SemaOverload.cpp
+++ b/lib/Sema/SemaOverload.cpp
@@ -11426,6 +11426,10 @@ static void AddOverloadedCallCandidate(Sema &S,
       assert(!KnownValid && "Explicit template arguments?");
       return;
     }
+    // Prevent ill-formed function decls to be added as overload candidates.
+    if (!dyn_cast<FunctionProtoType>(Func->getType()->getAs<FunctionType>()))
+      return;
+
     S.AddOverloadCandidate(Func, FoundDecl, Args, CandidateSet,
                            /*SuppressUsedConversions=*/false,
                            PartialOverloading);