1 files changed, 3 insertions, 0 deletions
diff --git a/clang/lib/StaticAnalyzer/Core/CFRefCount.cpp b/clang/lib/StaticAnalyzer/Core/CFRefCount.cpp
index 3c3bd3402ee..75feba478d9 100644
--- a/clang/lib/StaticAnalyzer/Core/CFRefCount.cpp
+++ b/clang/lib/StaticAnalyzer/Core/CFRefCount.cpp
@@ -2700,6 +2700,9 @@ public:
       return false;
     case LangOptions::GCOnly:
       return true;
+    default:
+      llvm_unreachable("Invalid/unknown GC mode.");
+      return false;
     }
   }