Bug 214133 – [ iOS WK2 Release ] fast/scrolling/ios/non-invertible-transformed-scroller-ancestor.html is a flaky failure

• Component: New Bugs
• Status: RESOLVED FIXED

[Karl Rackler]

fast/scrolling/ios/non-invertible-transformed-scroller-ancestor.html

Description:
The test is flaky failing on iOS WK2 release. It has been flaky failing since introduced.
Introduced here: https://trac.webkit.org/changeset/264031/webkit

History: 
https://results.webkit.org/?suite=layout-tests&test=fast%2Fscrolling%2Fios%2Fnon-invertible-transformed-scroller-ancestor.html&platform=ios&style=release&flavor=wk2&limit=50000

Diff: 
--- /Volumes/Data/slave/ios-simulator-13-release-tests-wk2/build/layout-test-results/fast/scrolling/ios/non-invertible-transformed-scroller-ancestor-expected.txt
+++ /Volumes/Data/slave/ios-simulator-13-release-tests-wk2/build/layout-test-results/fast/scrolling/ios/non-invertible-transformed-scroller-ancestor-actual.txt
@@ -3,7 +3,7 @@
 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
 
 
-PASS windowScrollTop > 0 is true
+FAIL windowScrollTop > 0 should be true. Was false.
 PASS overflowScrollTop is 0
 PASS successfullyParsed is true

[Radar WebKit Bug Importer]

<rdar://problem/65268636>

[Karl Rackler]

I can reproduce this on r264133 and r264025.
The regression introduction appears to be: r264025

Command: 
run-webkit-tests --ios-simulator --iterations 500 --exit-after-n-failures 3 --force -f fast/scrolling/ios/non-invertible-transformed-scroller-ancestor.html

Result: 
[5/500] fast/scrolling/ios/non-invertible-transformed-scroller-ancestor.html failed unexpectedly (text diff)
[5/500] fast/scrolling/ios/non-invertible-transformed-scroller-ancestor.html failed unexpectedly (text diff)
[5/500] fast/scrolling/ios/non-invertible-transformed-scroller-ancestor.html failed unexpectedly (text diff)
Exiting early after 3 failures. 3 tests run.


0 tests ran as expected, 3 didn't (497 didn't run):


Regressions: Unexpected text-only failures (1)
  fast/scrolling/ios/non-invertible-transformed-scroller-ancestor.html [ Failure ]

[Karl Rackler]

Created attachment 404146 [details]
Patch

[Karl Rackler]

I have marked this test as flaky failing while the issue is investigated.

[Truitt Savell]

This test was added in https://trac.webkit.org/changeset/264031/webkit

[EWS]

Committed r264302: <https://trac.webkit.org/changeset/264302>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 404146 [details].

[Truitt Savell]

Reopen because this was only an expectations change

[Simon Fraser (smfr)]

Created attachment 404418 [details]
Patch

[Simon Fraser (smfr)]

https://trac.webkit.org/changeset/264445/webkit