We should start to look at DevTools test failures with Stylo enabled since DevTools uses additional code paths that might not be hit when just styling content normally. An example try run[1] shows the current state. [1]: https://treeherder.mozilla.org/#/jobs?repo=try&revision=752bed7671c8df3c830b37df3115f5aa647c6428

Updated run now that a few crashing issues were fixed: https://treeherder.mozilla.org/#/jobs?repo=try&revision=5c5f4a1469f213ae25760cebfd5ea5f425b576ec

Some historical DevTools failure counts (looking at e10s opt only): 2017-04-19: 376 2017-05-23: 183 2017-06-07: 172 2017-06-16: 159 So, making progress at least! Some runs do crash though, so potentially more failures will be revealed once crashes are fixed.

Marking leave-open to use this bug to land some DevTools expectation updates for platform features that don't block shipping Stylo.

Comment on attachment 8880071 [details] Bug 1357715 - Skip DevTools tests on Stylo that use shadow DOM. https://reviewboard.mozilla.org/r/151392/#review156538

Pushed by jryans@gmail.com: https://hg.mozilla.org/integration/autoland/rev/a7a5b2fc4f0a Skip DevTools tests on Stylo that use shadow DOM. r=heycam

this caused perma failures after this landed on m-c like https://treeherder.mozilla.org/logviewer.html#?job_id=109517923&repo=mozilla-central

Backout by cbook@mozilla.com: https://hg.mozilla.org/mozilla-central/rev/594cc32b6323 Backed out changeset a7a5b2fc4f0a for causing perma failures after merged to m-c

(In reply to Carsten Book [:Tomcat] from comment #11) > this caused perma failures after this landed on m-c like > https://treeherder.mozilla.org/logviewer.html#?job_id=109517923&repo=mozilla- > central Bug 1375699 made the pref optional again, so we need to keep the try blocks.

Pushed by jryans@gmail.com: https://hg.mozilla.org/integration/autoland/rev/e6dfe16f777b Skip DevTools tests on Stylo that use shadow DOM. r=heycam

New failure count entry: 2017-04-19: 376 2017-05-23: 183 2017-06-07: 172 2017-06-16: 159 2017-06-29: 140

New failure count entry: 2017-04-19: 376 2017-05-23: 183 2017-06-07: 172 2017-06-16: 159 2017-06-29: 140 2017-07-11: 146

New failure count entry: 2017-04-19: 376 2017-05-23: 183 2017-06-07: 172 2017-06-16: 159 2017-06-29: 140 2017-07-11: 146 2017-07-12: 180

New failure count entry: 2017-04-19: 376 2017-05-23: 183 2017-06-07: 172 2017-06-16: 159 2017-06-29: 140 2017-07-11: 146 2017-07-12: 180 2017-07-24: 171

New failure count entry: 2017-04-19: 376 2017-05-23: 183 2017-06-07: 172 2017-06-16: 159 2017-06-29: 140 2017-07-11: 146 2017-07-12: 180 2017-07-24: 171 2017-07-25: 53

New failure count entry: 2017-04-19: 376 2017-05-23: 183 2017-06-07: 172 2017-06-16: 159 2017-06-29: 140 2017-07-11: 146 2017-07-12: 180 2017-07-24: 171 2017-07-25: 53 2017-08-01: 46

All DevTools tests are active with Stylo!