import from UXP: Issue #2686 - Don't rely on return value of ExecutionContext::Compile when the context may forbid running scripts (0590764f)

dom/script/ScriptLoader.cpp

@@ -2396,10 +2396,7 @@ ScriptLoader::EvaluateScript(ScriptLoadRequest* aRequest)
             rv = exec.Compile(options, srcBuf);
           }
           if (rv == NS_OK) {
-             JS::Rooted<JSScript*> script(cx);
-             script = exec.GetScript();
-
-             // With scripts disabled GetScript() will return nullptr
+             JS::Rooted<JSScript*> script(cx, exec.GetScript());
              if (script) {
                  // Create a ClassicScript object and associate it with the
                  // JSScript.