> 3140 WARNING: Mask layer with no compositable host: file gfx/layers/composite/LayerManagerComposite.cpp, line 1321 This warning [1] shows up in the following test suites: > 3088 - test-linux64/debug-mochitest-devtools-chrome-e10s-5 dt5 > 46 - test-linux64/debug-mochitest-devtools-chrome-e10s-10 dt10 > 6 - test-linux64/debug-mochitest-devtools-chrome-e10s-2 dt2 It shows up in 37 tests. A few of the most prevalent: > 153 - [e10s] devtools/client/animationinspector/test/browser_animation_target_highlighter_lock.js > 144 - [e10s] devtools/client/animationinspector/test/browser_animation_controller_exposes_document_currentTime.js > 126 - [e10s] devtools/client/animationinspector/test/browser_animation_timeline_shows_name_label.js > 126 - [e10s] devtools/client/animationinspector/test/browser_animation_refresh_on_added_animation.js > 117 - [e10s] devtools/client/animationinspector/test/browser_animation_timeline_shows_time_info.js > 108 - [e10s] devtools/client/animationinspector/test/browser_animation_refresh_when_active.js > 108 - [e10s] devtools/client/animationinspector/test/browser_animation_same_nb_of_playerWidgets_and_playerFronts.js > 108 - [e10s] devtools/client/animationinspector/test/browser_animation_shows_player_on_valid_node.js > 108 - [e10s] devtools/client/animationinspector/test/browser_animation_empty_on_invalid_nodes.js > 108 - [e10s] devtools/client/animationinspector/test/browser_animation_timeline_shows_delay.js [1] https://hg.mozilla.org/mozilla-central/annotate/2977ca122452/gfx/layers/composite/LayerManagerComposite.cpp#l1321

Bisection points to https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=6bd789dee7a6fc7bc86934148b44421cbaf6ef48&tochange=d768c92253e97fafa7cee440573ac60f49a8c659 which is bug 1242986. Unfortunately that's just enabling e10s devtools tests, but at least we can tell this is e10s only.

Inspector bug triage (filter on CLIMBING SHOES).

This has become more verbose and is currently the 2nd largest warning during testing.

Zero warnings in a try run [1], so looks good from that angle. [1] https://treeherder.mozilla.org/#/jobs?repo=try&revision=6b38788c5b1fec5c67f1f061c0ddab6bedf2410e

(Thanks for the try run erahm, I uploaded the patch in a hurry and forgot to add the investigation/explanation below) I could reproduce the issue on a debug build on Ubuntu. The warnings occur even without opening the devtools during the test. Fiddling with the test page (), the warnings go away when removing the `border-radius` or the `background` property from the .ball class at: http://searchfox.org/mozilla-central/rev/02a56df6474a97cf84d94bbcfaa126979970905d/devtools/client/animationinspector/test/doc_simple_animation.html#10 If we add an actual border to the element (such as 1px solid white), the warnings also disappear. pbro: I propose we land this as a workaround and leave-open while we investigate for the real root cause of the issue.

Comment on attachment 8829981 [details] Bug 1329784 - avoid layout warnings in animation inspector debug tests; https://reviewboard.mozilla.org/r/106934/#review108164 Sure. That works for me as a workaround. We could also remove the border-radius altogether, these tests don't care about the shape of the elements. But, yeah, sounds like we should investigate the root cause causing the warning on Linux debug.

Pushed by jdescottes@mozilla.com: https://hg.mozilla.org/integration/autoland/rev/e00ee63857b5 avoid layout warnings in animation inspector debug tests;r=pbro

Tomcat: here's the follow up for the test failure. Sorry about that!

Pushed by cbook@mozilla.com: https://hg.mozilla.org/integration/autoland/rev/23fce11bd83b fix bustage in browser_animation_animated_properties_displayed.js;r=me a=tomcat

(In reply to Julian Descottes [:jdescottes] from comment #9) > Created attachment 8830216 [details] [diff] [review] > bug1329784.bustage.patch > > Tomcat: here's the follow up for the test failure. Sorry about that! landed :) and np :)

https://hg.mozilla.org/mozilla-central/rev/e00ee63857b5 https://hg.mozilla.org/mozilla-central/rev/23fce11bd83b

No action left on DevTools side.