1722644 - Perma Linux DevEdition failures in test_restyles.html, test_mql_event_listener_leaks.html, test_selectors.html, test_transitions.html when Gecko 92 merges to Beta on 2021-08-09

Status: VERIFIED FIXED

(Core :: DOM: Animation, defect)

Description

[Alexandru Michis [:malexandru]]

central-as-early-beta simulation
failure log
how to run these simulations

[task 2021-07-25T11:41:24.280Z] 11:41:24     INFO - TEST-START | dom/animation/test/mozilla/test_restyles.html
[task 2021-07-25T11:41:59.093Z] 11:41:59     INFO - TEST-INFO | started process screentopng
[task 2021-07-25T11:41:59.367Z] 11:41:59     INFO - TEST-INFO | screentopng: exit 0
[task 2021-07-25T11:41:59.375Z] 11:41:59     INFO - Buffered messages logged at 11:41:58
[task 2021-07-25T11:41:59.375Z] 11:41:59     INFO - add_task | Entering test restyling_for_main_thread_animations
[task 2021-07-25T11:41:59.375Z] 11:41:59     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | undefined assertion name 
[task 2021-07-25T11:41:59.375Z] 11:41:59     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | CSS animations running on the main-thread should update style on the main thread 
[task 2021-07-25T11:41:59.376Z] 11:41:59     INFO - add_task | Leaving test restyling_for_main_thread_animations
[task 2021-07-25T11:41:59.376Z] 11:41:59     INFO - add_task | Entering test no_restyling_for_compositor_animations
[task 2021-07-25T11:41:59.376Z] 11:41:59     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | undefined assertion name 
[task 2021-07-25T11:41:59.376Z] 11:41:59     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | CSS animations running on the compositor should not update style on the main thread 
[task 2021-07-25T11:41:59.377Z] 11:41:59     INFO - add_task | Leaving test no_restyling_for_compositor_animations
[task 2021-07-25T11:41:59.377Z] 11:41:59     INFO - add_task | Entering test no_restyling_for_compositor_transitions
[task 2021-07-25T11:41:59.378Z] 11:41:59     INFO - Buffered messages logged at 11:41:59
[task 2021-07-25T11:41:59.378Z] 11:41:59     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | undefined assertion name 
[task 2021-07-25T11:41:59.379Z] 11:41:59     INFO - Buffered messages finished
[task 2021-07-25T11:41:59.379Z] 11:41:59     INFO - TEST-UNEXPECTED-FAIL | dom/animation/test/mozilla/test_restyles.html | CSS transitions running on the compositor should not update style on the main thread - got 1, expected +0
[task 2021-07-25T11:41:59.380Z] 11:41:59     INFO -     SimpleTest.is@SimpleTest/SimpleTest.js:500:14
[task 2021-07-25T11:41:59.380Z] 11:41:59     INFO -     no_restyling_for_compositor_transitions@dom/animation/test/mozilla/file_restyles.html:166:7
[task 2021-07-25T11:41:59.381Z] 11:41:59     INFO - add_task | Leaving test no_restyling_for_compositor_transitions
[task 2021-07-25T11:41:59.381Z] 11:41:59     INFO - add_task | Entering test no_restyling_when_animation_duration_is_changed
[task 2021-07-25T11:41:59.381Z] 11:41:59     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | undefined assertion name 
[task 2021-07-25T11:41:59.381Z] 11:41:59     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Animations running on the compositor should not update style on the main thread 
[task 2021-07-25T11:41:59.382Z] 11:41:59     INFO - add_task | Leaving test no_restyling_when_animation_duration_is_changed
[task 2021-07-25T11:41:59.383Z] 11:41:59     INFO - add_task | Entering test only_one_restyling_after_finish_is_called
[task 2021-07-25T11:41:59.384Z] 11:41:59     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | undefined assertion name 
[task 2021-07-25T11:41:59.385Z] 11:41:59     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Animations running on the compositor should only update style once after finish() is called 
[task 2021-07-25T11:41:59.386Z] 11:41:59     INFO - TEST-FAIL | dom/animation/test/mozilla/test_restyles.html | Bug 1415457: Animations running on the compositor should only update style once after finish() is called - got 1, expected +0
[task 2021-07-25T11:41:59.390Z] 11:41:59     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Finished animations should never update style after one restyle happened for finish() 
[task 2021-07-25T11:41:59.408Z] 11:41:59     INFO - add_task | Leaving test only_one_restyling_after_finish_is_called
[task 2021-07-25T11:41:59.408Z] 11:41:59     INFO - add_task | Entering test no_restyling_mouse_movement_on_finished_transition
[task 2021-07-25T11:41:59.463Z] 11:41:59     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Finished transitions should restyle once after Animation.finished was fulfilled 
[task 2021-07-25T11:41:59.542Z] 11:41:59     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Finished transitions should never cause restyles when mouse is moved on the transitions 
[task 2021-07-25T11:41:59.556Z] 11:41:59     INFO - add_task | Leaving test no_restyling_mouse_movement_on_finished_transition
[task 2021-07-25T11:41:59.557Z] 11:41:59     INFO - add_task | Entering test no_restyling_mouse_movement_on_finished_animation
[task 2021-07-25T11:41:59.608Z] 11:41:59     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Finished animations should restyle once after Animation.finished was fulfilled 
[task 2021-07-25T11:41:59.691Z] 11:41:59     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Finished animations should never cause restyles when mouse is moved on the animations 
[task 2021-07-25T11:41:59.707Z] 11:41:59     INFO - add_task | Leaving test no_restyling_mouse_movement_on_finished_animation
[task 2021-07-25T11:41:59.708Z] 11:41:59     INFO - add_task | Entering test no_restyling_compositor_animations_out_of_view_element
[task 2021-07-25T11:41:59.739Z] 11:41:59     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | undefined assertion name 
[task 2021-07-25T11:41:59.826Z] 11:41:59     INFO - Not taking screenshot here: see the one that was previously logged
[task 2021-07-25T11:41:59.826Z] 11:41:59     INFO - TEST-UNEXPECTED-FAIL | dom/animation/test/mozilla/test_restyles.html | Animations running on the compositor in an out-of-view element should never cause restyles - got 1, expected +0
[task 2021-07-25T11:41:59.827Z] 11:41:59     INFO -     SimpleTest.is@SimpleTest/SimpleTest.js:500:14
[task 2021-07-25T11:41:59.827Z] 11:41:59     INFO -     no_restyling_compositor_animations_out_of_view_element@dom/animation/test/mozilla/file_restyles.html:281:7
[task 2021-07-25T11:41:59.840Z] 11:41:59     INFO - add_task | Leaving test no_restyling_compositor_animations_out_of_view_element
[task 2021-07-25T11:41:59.840Z] 11:41:59     INFO - add_task | Entering test no_restyling_main_thread_animations_out_of_view_element
[task 2021-07-25T11:41:59.957Z] 11:41:59     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Animations running on the main-thread in an out-of-view element should never cause restyles 
[task 2021-07-25T11:41:59.974Z] 11:41:59     INFO - add_task | Leaving test no_restyling_main_thread_animations_out_of_view_element
[task 2021-07-25T11:41:59.974Z] 11:41:59     INFO - add_task | Entering test no_restyling_compositor_animations_in_scrolled_out_element
[task 2021-07-25T11:42:00.091Z] 11:42:00     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Animations running on the compositor for elements which are scrolled out should never cause restyles 
[task 2021-07-25T11:42:00.110Z] 11:42:00     INFO - add_task | Leaving test no_restyling_compositor_animations_in_scrolled_out_element
[task 2021-07-25T11:42:00.110Z] 11:42:00     INFO - add_task | Entering test no_restyling_missing_keyframe_opacity_animations_on_scrolled_out_element
[task 2021-07-25T11:42:00.224Z] 11:42:00     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Opacity animations on scrolled out elements should never cause restyles even if the animation has missing keyframes 
[task 2021-07-25T11:42:00.241Z] 11:42:00     INFO - add_task | Leaving test no_restyling_missing_keyframe_opacity_animations_on_scrolled_out_element
[task 2021-07-25T11:42:00.243Z] 11:42:00     INFO - add_task | Entering test restyling_transform_animations_in_scrolled_out_element
[task 2021-07-25T11:42:00.257Z] 11:42:00     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | The transform animation is not running on the compositor 
[task 2021-07-25T11:42:00.394Z] 11:42:00     INFO - Not taking screenshot here: see the one that was previously logged
[task 2021-07-25T11:42:00.394Z] 11:42:00     INFO - TEST-UNEXPECTED-FAIL | dom/animation/test/mozilla/test_restyles.html | Transform animation running on the element which is scrolled out should be throttled until 200ms is elapsed. now: 35003.46 start time: 34886.86 elapsed:116.59999999999854 
[task 2021-07-25T11:42:00.395Z] 11:42:00     INFO -     SimpleTest.ok@SimpleTest/SimpleTest.js:417:16
[task 2021-07-25T11:42:00.395Z] 11:42:00     INFO -     restyling_transform_animations_in_scrolled_out_element@dom/animation/test/mozilla/file_restyles.html:373:9
[task 2021-07-25T11:42:00.408Z] 11:42:00     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Transform animation running on the element which is scrolled out should be unthrottled after around 200ms have elapsed. now: 35036.66 start time: 35019.56 elapsed: 17.10000000000582 
[task 2021-07-25T11:42:00.423Z] 11:42:00     INFO - add_task | Leaving test restyling_transform_animations_in_scrolled_out_element
[task 2021-07-25T11:42:00.424Z] 11:42:00     INFO - add_task | Entering test restyling_out_of_view_transform_animations_in_another_element
[task 2021-07-25T11:42:00.440Z] 11:42:00     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | The transform animation on out of view element is not running on the compositor 
[task 2021-07-25T11:42:00.657Z] 11:42:00     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Transform animation running on out of view element should be throttled until 200ms is elapsed. now: 35270.2 start time: 35069.82 elapsed:200.37999999999738 
[task 2021-07-25T11:42:00.676Z] 11:42:00     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Transform animation running on out of view element should be unthrottled after around 200ms have elapsed. now: 35303.38 start time: 35286.3 elapsed: 17.07999999999447 
[task 2021-07-25T11:42:00.679Z] 11:42:00     INFO - add_task | Leaving test restyling_out_of_view_transform_animations_in_another_element
[task 2021-07-25T11:42:00.680Z] 11:42:00     INFO - add_task | Entering test finite_transform_animations_in_out_of_view_element
[task 2021-07-25T11:42:00.707Z] 11:42:00     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | undefined assertion name 
[task 2021-07-25T11:42:01.046Z] 11:42:01     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Finite transform animation in out-of-view element should never be throttled 
[task 2021-07-25T11:42:01.059Z] 11:42:01     INFO - add_task | Leaving test finite_transform_animations_in_out_of_view_element
[task 2021-07-25T11:42:01.059Z] 11:42:01     INFO - add_task | Entering test restyling_main_thread_animations_in_scrolled_out_element
[task 2021-07-25T11:42:01.175Z] 11:42:01     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Animations running on the main-thread for elements which are scrolled out should never cause restyles 
[task 2021-07-25T11:42:02.925Z] 11:42:02     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Animations running on the main-thread which were in scrolled out elements should update restyling soon after the element moved in view by scrolling 
[task 2021-07-25T11:42:02.940Z] 11:42:02     INFO - add_task | Leaving test restyling_main_thread_animations_in_scrolled_out_element
[task 2021-07-25T11:42:02.941Z] 11:42:02     INFO - add_task | Entering test restyling_main_thread_animations_in_nested_scrolled_out_element
[task 2021-07-25T11:42:03.057Z] 11:42:03     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Animations running on the main-thread which are in nested elements which are scrolled out should never cause restyles 
[task 2021-07-25T11:42:06.326Z] 11:42:06     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Animations running on the main-thread which were in nested scrolled out elements should update restyle soon after the element moved in view by scrolling 
[task 2021-07-25T11:42:06.342Z] 11:42:06     INFO - add_task | Leaving test restyling_main_thread_animations_in_nested_scrolled_out_element
[task 2021-07-25T11:42:06.344Z] 11:42:06     INFO - add_task | Entering test no_restyling_compositor_animations_in_visibility_hidden_element
[task 2021-07-25T11:42:06.373Z] 11:42:06     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | undefined assertion name 
[task 2021-07-25T11:42:06.457Z] 11:42:06     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Animations running on the compositor in visibility hidden element should never cause restyles 
[task 2021-07-25T11:42:06.474Z] 11:42:06     INFO - add_task | Leaving test no_restyling_compositor_animations_in_visibility_hidden_element
[task 2021-07-25T11:42:06.476Z] 11:42:06     INFO - add_task | Entering test restyling_main_thread_animations_move_out_of_view_by_scrolling
[task 2021-07-25T11:42:08.691Z] 11:42:08     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Animations running on the main-thread which are in scrolled out elements should throttle restyling 
[task 2021-07-25T11:42:08.708Z] 11:42:08     INFO - add_task | Leaving test restyling_main_thread_animations_move_out_of_view_by_scrolling
[task 2021-07-25T11:42:08.710Z] 11:42:08     INFO - add_task | Entering test restyling_main_thread_animations_moved_in_view_by_resizing
[task 2021-07-25T11:42:08.824Z] 11:42:08     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Animations running on the main-thread which is in scrolled out elements should not update restyling 
[task 2021-07-25T11:42:08.841Z] 11:42:08     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Animations running on the main-thread which was in scrolled out elements should update restyling soon after the element moved in view by resizing 
[task 2021-07-25T11:42:08.857Z] 11:42:08     INFO - add_task | Leaving test restyling_main_thread_animations_moved_in_view_by_resizing
[task 2021-07-25T11:42:08.858Z] 11:42:08     INFO - add_task | Entering test restyling_animations_on_visibility_changed_element_having_child
[task 2021-07-25T11:42:08.991Z] 11:42:08     INFO - TEST-FAIL | dom/animation/test/mozilla/test_restyles.html | Animations running on visibility hidden element which has a child whose visiblity is inherited from the element and the element was initially visible - got 5, expected +0
[task 2021-07-25T11:42:09.007Z] 11:42:09     INFO - add_task | Leaving test restyling_animations_on_visibility_changed_element_having_child
[task 2021-07-25T11:42:09.008Z] 11:42:09     INFO - add_task | Entering test restyling_animations_on_visibility_hidden_element_which_gets_visible
[task 2021-07-25T11:42:09.125Z] 11:42:09     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Animations running on visibility hidden element should never cause restyles 
[task 2021-07-25T11:42:09.224Z] 11:42:09     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Animations running that was on visibility hidden element which gets visible should not throttle restyling any more 
[task 2021-07-25T11:42:09.242Z] 11:42:09     INFO - add_task | Leaving test restyling_animations_on_visibility_hidden_element_which_gets_visible
[task 2021-07-25T11:42:09.242Z] 11:42:09     INFO - add_task | Entering test restyling_animations_in_visibility_changed_parent
[task 2021-07-25T11:42:09.358Z] 11:42:09     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Animations running in visibility hidden parent should never cause restyles 
[task 2021-07-25T11:42:09.457Z] 11:42:09     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Animations that was in visibility hidden parent should not throttle restyling any more 
[task 2021-07-25T11:42:09.558Z] 11:42:09     INFO - Not taking screenshot here: see the one that was previously logged
[task 2021-07-25T11:42:09.559Z] 11:42:09     INFO - TEST-UNEXPECTED-FAIL | dom/animation/test/mozilla/test_restyles.html | Animations that the parent element became visible should throttle restyling again - got 1, expected +0
[task 2021-07-25T11:42:09.559Z] 11:42:09     INFO -     SimpleTest.is@SimpleTest/SimpleTest.js:500:14
[task 2021-07-25T11:42:09.560Z] 11:42:09     INFO -     restyling_animations_in_visibility_changed_parent@dom/animation/test/mozilla/file_restyles.html:691:7
[task 2021-07-25T11:42:09.564Z] 11:42:09     INFO - add_task | Leaving test restyling_animations_in_visibility_changed_parent
[task 2021-07-25T11:42:09.566Z] 11:42:09     INFO - add_task | Entering test restyling_animations_on_visibility_hidden_element_with_visibility_changed_children
[task 2021-07-25T11:42:09.677Z] 11:42:09     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Animations on visibility hidden element having no visible children should never cause restyles 
[task 2021-07-25T11:42:09.775Z] 11:42:09     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Animations running on visibility hidden element but the element has a visible child should not throttle restyling 
[task 2021-07-25T11:42:09.875Z] 11:42:09     INFO - TEST-FAIL | dom/animation/test/mozilla/test_restyles.html | Animations running on visibility hidden element that a child has become invisible should throttle restyling - got 5, expected +0
[task 2021-07-25T11:42:09.975Z] 11:42:09     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Animations running on visibility hidden element should not throttle restyling after the invisible element changed to visible 
[task 2021-07-25T11:42:10.075Z] 11:42:10     INFO - TEST-FAIL | dom/animation/test/mozilla/test_restyles.html | Animations running on visibility hidden element should throttle restyling again after all visible descendants were removed - got 5, expected +0
[task 2021-07-25T11:42:10.089Z] 11:42:10     INFO - add_task | Leaving test restyling_animations_on_visibility_hidden_element_with_visibility_changed_children
[task 2021-07-25T11:42:10.091Z] 11:42:10     INFO - add_task | Entering test restyling_animations_on_visiblity_hidden_element_having_oof_child
[task 2021-07-25T11:42:10.225Z] 11:42:10     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Animations running on visibility hidden element which has an out-of-flow child should throttle restyling 
[task 2021-07-25T11:42:10.228Z] 11:42:10     INFO - add_task | Leaving test restyling_animations_on_visiblity_hidden_element_having_oof_child
[task 2021-07-25T11:42:10.230Z] 11:42:10     INFO - add_task | Entering test restyling_animations_on_visibility_hidden_element_having_grandchild
[task 2021-07-25T11:42:10.340Z] 11:42:10     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Animations on visibility hidden element having no visible descendants should never cause restyles 
[task 2021-07-25T11:42:10.442Z] 11:42:10     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Animations running on visibility hidden element but the element has visible children should not throttle restyling 
[task 2021-07-25T11:42:10.542Z] 11:42:10     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Animations running on visibility hidden element that a child has become invisible again but there are still visible children should not throttle restyling 
[task 2021-07-25T11:42:10.641Z] 11:42:10     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Animations running on visibility hidden element that a grandchild become invisible again but another grandchild is still visible should not throttle restyling 
[task 2021-07-25T11:42:10.749Z] 11:42:10     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Animations running on visibility hidden element but the element has visible descendants should not throttle restyling 
[task 2021-07-25T11:42:10.841Z] 11:42:10     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Animations running on visibility hidden element but the element has visible grandchildren should not throttle restyling 
[task 2021-07-25T11:42:10.940Z] 11:42:10     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Animations running on visibility hidden element but the element has a visible grandchild should not throttle restyling 
[task 2021-07-25T11:42:11.048Z] 11:42:11     INFO - TEST-FAIL | dom/animation/test/mozilla/test_restyles.html | Animations on visibility hidden element that all descendants have become invisible again should never cause restyles - got 5, expected +0
[task 2021-07-25T11:42:11.145Z] 11:42:11     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Animations on visibility hidden element that has a visible child should never cause restyles 
[task 2021-07-25T11:42:11.241Z] 11:42:11     INFO - TEST-FAIL | dom/animation/test/mozilla/test_restyles.html | Animations on visibility hidden element that the visible child has become invisible again should never cause restyles - got 5, expected +0
[task 2021-07-25T11:42:11.256Z] 11:42:11     INFO - add_task | Leaving test restyling_animations_on_visibility_hidden_element_having_grandchild
[task 2021-07-25T11:42:11.258Z] 11:42:11     INFO - add_task | Entering test no_restyling_compositor_animations_after_pause_is_called
[task 2021-07-25T11:42:11.290Z] 11:42:11     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | undefined assertion name 
[task 2021-07-25T11:42:11.326Z] 11:42:11     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Animations running on the compositor should restyle once after Animation.pause() was called 
[task 2021-07-25T11:42:11.407Z] 11:42:11     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Paused animations running on the compositor should never cause restyles 
[task 2021-07-25T11:42:11.423Z] 11:42:11     INFO - add_task | Leaving test no_restyling_compositor_animations_after_pause_is_called
[task 2021-07-25T11:42:11.426Z] 11:42:11     INFO - add_task | Entering test no_restyling_main_thread_animations_after_pause_is_called
[task 2021-07-25T11:42:11.490Z] 11:42:11     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Animations running on the main-thread should restyle once after Animation.pause() was called 
[task 2021-07-25T11:42:11.573Z] 11:42:11     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Paused animations running on the main-thread should never cause restyles 
[task 2021-07-25T11:42:11.591Z] 11:42:11     INFO - add_task | Leaving test no_restyling_main_thread_animations_after_pause_is_called
[task 2021-07-25T11:42:11.592Z] 11:42:11     INFO - add_task | Entering test only_one_restyling_when_current_time_is_set_to_middle_of_duration
[task 2021-07-25T11:42:11.708Z] 11:42:11     INFO - Not taking screenshot here: see the one that was previously logged
[task 2021-07-25T11:42:11.709Z] 11:42:11     INFO - TEST-UNEXPECTED-FAIL | dom/animation/test/mozilla/test_restyles.html | Bug 1235478: Animations running on the compositor should only once update style when currentTime is set to middle of duration time - got 2, expected 1
[task 2021-07-25T11:42:11.710Z] 11:42:11     INFO -     SimpleTest.is@SimpleTest/SimpleTest.js:500:14
[task 2021-07-25T11:42:11.711Z] 11:42:11     INFO -     only_one_restyling_when_current_time_is_set_to_middle_of_duration@dom/animation/test/mozilla/file_restyles.html:956:7
[task 2021-07-25T11:42:11.723Z] 11:42:11     INFO - add_task | Leaving test only_one_restyling_when_current_time_is_set_to_middle_of_duration
[task 2021-07-25T11:42:11.725Z] 11:42:11     INFO - add_task | Entering test change_duration_and_currenttime
[task 2021-07-25T11:42:11.741Z] 11:42:11     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | undefined assertion name 
[task 2021-07-25T11:42:11.742Z] 11:42:11     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | undefined assertion name 
[task 2021-07-25T11:42:11.823Z] 11:42:11     INFO - TEST-PASS | dom/animation/test/mozilla/test_restyles.html | Animations running on the compositor should update style when duration is made longer than the current time 
[task 2021-07-25T11:42:11.840Z] 11:42:11     INFO - add_task | Leaving test change_duration_and_currenttime

These failures have appeared on the 21st of July.
Failures on the beta simulation from the 27th show no failures in test_restyles.html

Comment 1

[Emilio Cobos Álvarez (:emilio)]

Moderately sure these will be fixed in bug 1722480.

Comment 2

[Sebastian Hengst [:aryx] (needinfo me if it's about an intermittent or backout)]

Verified fixed with the latest central-as-beta simulation.