Merge pull request #77285 from xymus/recover-under-loadObjCMethods

Serialization: Recover from errors under `loadObjCMethods`

lib/Serialization/ModuleFile.cpp

@@ -713,8 +713,15 @@ void ModuleFile::loadObjCMethods(
       continue;
 
     // Deserialize the method and add it to the list.
+    // Drop methods with errors.
+    auto funcOrError = getDeclChecked(std::get<2>(result));
+    if (!funcOrError) {
+      diagnoseAndConsumeError(funcOrError.takeError());
+      continue;
+    }
+
     if (auto func = dyn_cast_or_null<AbstractFunctionDecl>(
-                      getDecl(std::get<2>(result)))) {
+                      funcOrError.get())) {
       methods.push_back(func);
     }
   }