Bug 206947 - REGRESSION (r255338): [Catalina WK1] Multiple throttling layout tests became flaky
Summary: REGRESSION (r255338): [Catalina WK1] Multiple throttling layout tests became ...
Status: RESOLVED CONFIGURATION CHANGED
Alias: None
Product: WebKit
Classification: Unclassified
Component: New Bugs (show other bugs)
Version: WebKit Nightly Build
Hardware: Unspecified Unspecified
: P2 Normal
Assignee: Nobody
URL:
Keywords: InRadar
Depends on:
Blocks:
 
Reported: 2020-01-29 10:30 PST by Jacob Uphoff
Modified: 2020-01-29 14:54 PST (History)
2 users (show)

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Description Jacob Uphoff 2020-01-29 10:30:23 PST 
fast/dom/nested-timer-visible-element-throttling.html

along with multiple other tests under "throttling" re flaky failures

History: 
https://results.webkit.org/?suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&test=fast%2Fdom%2Fnested-timer-visible-element-throttling.html&test=fast%2Fdom%2Frepeating-timer-element-overflow-throttling.html&test=fast%2Fdom%2Frepeating-timer-element-overflowing-child-own-layer-throttling.html&test=fast%2Fdom%2Frepeating-timer-mixed-visible-display-none-elements-throttling.html&test=fast%2Fdom%2Frepeating-timer-visible-element-throttling.html&test=fast%2Fdom%2Ftimer-height-change-no-throttling.html&platform=mac

Diff: 

--- /Volumes/Data/slave/catalina-release-tests-wk1/build/layout-test-results/fast/dom/nested-timer-visible-element-throttling-expected.txt
+++ /Volumes/Data/slave/catalina-release-tests-wk1/build/layout-test-results/fast/dom/nested-timer-visible-element-throttling-actual.txt
@@ -6,9 +6,9 @@
 The timer should initially not be throttled.
 PASS internals.isTimerThrottled(timeoutId) is false
 5th iteration, timer should not have been throttled.
-PASS wasThrottled is false
+FAIL wasThrottled should be false. Was true.
 6th iteration, timer should still be unthrottled.
-PASS internals.isTimerThrottled(timeoutId) is false
+FAIL internals.isTimerThrottled(timeoutId) should be false. Was true.
 PASS successfullyParsed is true
 
 TEST COMPLETE
Comment 1 Radar WebKit Bug Importer 2020-01-29 10:30:41 PST 
<rdar://problem/58996561>
Comment 2 Ryan Haddad 2020-01-29 10:52:42 PST 
This started with:
REGRESSION (r255158): http/tests/frame-throttling/raf-throttle-in-cross-origin-subframe.html is a flaky failure
​https://bugs.webkit.org/show_bug.cgi?id=206839
https://trac.webkit.org/changeset/255338/webkit
Comment 3 Ryan Haddad 2020-01-29 14:54:43 PST 
Reverted r255338 for reason:

Introduced flakiness in multiple throttling layout tests

Committed r255388: <https://trac.webkit.org/changeset/255388>