chromium/src/third_party/blink/web_tests/external/wpt/workers/constructors/Worker/AbstractWorker.onerror.js

for (;) // should cause onerror to be invoked, but onerror is null, so
        // the error is "not handled". should fire an ErrorEvent on the
        // worker.
  break;
postMessage(1); // shouldn't do anything since the script doesn't compile