diff --git a/lldb/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCRuntimeV2.cpp b/lldb/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCRuntimeV2.cpp
--- a/lldb/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCRuntimeV2.cpp
+++ b/lldb/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCRuntimeV2.cpp
@@ -1439,7 +1439,8 @@
                                           g_get_dynamic_class_info2_name);
     return m_objc_copyRealizedClassList_helper.utility_function.get();
   }
-  };
+  }
+  llvm_unreachable("Unexpected helper");
 }
 
 lldb::addr_t &
@@ -1450,6 +1451,7 @@
   case objc_copyRealizedClassList:
     return m_objc_copyRealizedClassList_helper.args;
   }
+  llvm_unreachable("Unexpected helper");
 }
 
 AppleObjCRuntimeV2::DynamicClassInfoExtractor::Helper