test_workerUpdate was hitting intermittent asserts too in addition to the timeouts. https://treeherder.mozilla.org/logviewer.html#?job_id=6697595&repo=mozilla-inbound

It is quite possible that the fix is a simple undefined error. I'm awaiting several try runs that may fix both these intermittents.

Based on my try runs this 'a is undefined' error due to non-existent registration seems to be causing all the intermittents. I'm not sure why a JS error was doing that, but the results seem to speak for themselves https://treeherder.mozilla.org/#/jobs?repo=try&revision=2e061f64f46a

Comment on attachment 8566425 [details] [diff] [review] Fix SW intermittents Review of attachment 8566425 [details] [diff] [review]: ----------------------------------------------------------------- ::: dom/workers/test/serviceworkers/simpleregister/index.html @@ -36,5 @@ > } > }); > > - navigator.serviceWorker.getRegistration('http://mochi.test:8888/with_star/*') > - .then(function(a) { but in theory this should work, correct? So we have some kind of bug somewhere... right?

There is no longer any registration call for with_star scope. Which means 'a' is undefined.

Ugh, actually ignore this. I just realized the try push had the tests disabled :(

Comment on attachment 8572798 [details] [diff] [review] Enable worker update and unregister tests Review of attachment 8572798 [details] [diff] [review]: ----------------------------------------------------------------- if green on try!