[Patcher > Base] Refuse to patch keys which don't exist

src/util/patcher/base.js

@@ -79,6 +79,11 @@ const generateNewFunction = (originalFunction, id, functionName, keyName) => (fu
 });
 
 export const patch = (parent, functionName, handler, before = false) => {
+  if (!parent[functionName]) {
+    goosemod.logger.debug('patcher', 'Failed to patch as key doesn\'t exist', parent, functionName);
+    return () => {}; // Stub func to not break
+  }
+
   if (!parent._goosemodPatcherId) {
     const id = generateId();