Bug 207194

Summary: REGRESSION: [ iOS wk2 ] fast/scrolling/ios/scroll-events-back-forward.html is flaky failing
Product: WebKit Reporter: Jason Lawrence <Lawrence.j>
Component: ScrollingAssignee: Chris Dumez <cdumez>
Status: RESOLVED FIXED    
Severity: Normal CC: achristensen, cdumez, commit-queue, ggaren, simon.fraser, thorton, tsavell, webkit-bot-watchers-bugzilla, webkit-bug-importer, wenson_hsieh
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: iPhone / iPad   
OS: iOS 13   
Attachments:
Description Flags
Update Test Expectations
none
WIP Patch
none
Patch
wenson_hsieh: review+, commit-queue: commit-queue-
Update Test Expectations none

Jason Lawrence
Reported 2020-02-04 06:51:45 PST
fast/scrolling/ios/scroll-events-back-forward.html Description: This test is flaky failing on iOS. It has a possible regression point of 255234. History: https://results.webkit.org/?suite=layout-tests&test=fast%2Fscrolling%2Fios%2Fscroll-events-back-forward.html&platform=ios&limit=50000 Diff: --- /Volumes/Data/slave/ipados-simulator-13-debug-tests-wk2/build/layout-test-results/fast/scrolling/ios/scroll-events-back-forward-expected.txt +++ /Volumes/Data/slave/ipados-simulator-13-debug-tests-wk2/build/layout-test-results/fast/scrolling/ios/scroll-events-back-forward-actual.txt @@ -5,7 +5,7 @@ pageshow 0 pageshow 1 -PASS scrollEventCount is 1 +FAIL scrollEventCount should be 1. Was 0. PASS successfullyParsed is true TEST COMPLETE
Attachments
Update Test Expectations (1.56 KB, patch)
2020-02-04 07:12 PST, Jason Lawrence 		no flags
DetailsFormatted DiffDiff
WIP Patch (2.23 KB, patch)
2020-02-05 08:49 PST, Chris Dumez 		no flags
DetailsFormatted DiffDiff
Patch (3.89 KB, patch)
2020-02-05 08:55 PST, Chris Dumez 		wenson_hsieh: review+
commit-queue: commit-queue-
DetailsFormatted DiffDiff
Update Test Expectations (1.46 KB, patch)
2020-02-06 08:14 PST, Jason Lawrence 		no flags
DetailsFormatted DiffDiff
Show Obsolete (3) View All Add attachment proposed patch, testcase, etc.
Radar WebKit Bug Importer
Comment 1 2020-02-04 06:52:11 PST
<rdar://problem/59148073>
Jason Lawrence
Comment 2 2020-02-04 06:54:50 PST
I am able to reproduce this issue with run-webkit-tests using iterations. It failed 5x in 951 runs.
Jason Lawrence
Comment 3 2020-02-04 07:12:51 PST
Created attachment 389657 [details] Update Test Expectations
Truitt Savell
Comment 4 2020-02-04 07:42:08 PST
Comment on attachment 389657 [details] Update Test Expectations Clearing flags on attachment: 389657 Committed r255672: <https://trac.webkit.org/changeset/255672>
Alexey Proskuryakov
Comment 5 2020-02-04 09:04:15 PST
I see a slightly earlier failure on 2019-11-08 on internal tests, but yes, it's clearly a regression around that date. The test never failed before that date, and became a frequent failure afterwards. Given that the test uses a 10 ms timer that may race with events, this may be a bad test, but going from zero to many failures suggests something more substantial to me.
Chris Dumez
Comment 6 2020-02-05 08:49:34 PST
Created attachment 389813 [details] WIP Patch
Chris Dumez
Comment 7 2020-02-05 08:55:43 PST
Created attachment 389814 [details] Patch
WebKit Commit Bot
Comment 8 2020-02-05 10:05:06 PST
Comment on attachment 389814 [details] Patch Rejecting attachment 389814 [details] from commit-queue. Failed to run "['/Volumes/Data/EWS/WebKit/Tools/Scripts/webkit-patch', '--status-host=webkit-queues.webkit.org', '--bot-id=webkit-cq-01', 'land-attachment', '--force-clean', '--non-interactive', '--parent-command=commit-queue', 389814, '--port=mac']" exit_code: 2 cwd: /Volumes/Data/EWS/WebKit Logging in as commit-queue@webkit.org... Fetching: https://bugs.webkit.org/attachment.cgi?id=389814&action=edit Fetching: https://bugs.webkit.org/show_bug.cgi?id=207194&ctype=xml&excludefield=attachmentdata Processing 1 patch from 1 bug. Updating working directory Processing patch 389814 from bug 207194. Fetching: https://bugs.webkit.org/attachment.cgi?id=389814 Failed to run "[u'/Volumes/Data/EWS/WebKit/Tools/Scripts/svn-apply', '--force', '--reviewer', u'Wenson Hsieh']" exit_code: 1 cwd: /Volumes/Data/EWS/WebKit Parsed 4 diffs from patch file(s). patching file LayoutTests/ChangeLog Hunk #1 succeeded at 1 with fuzz 1. patching file LayoutTests/fast/scrolling/ios/scroll-events-back-forward-expected.txt patching file LayoutTests/fast/scrolling/ios/scroll-events-back-forward.html patching file LayoutTests/platform/ios-wk2/TestExpectations Hunk #1 FAILED at 1373. 1 out of 1 hunk FAILED -- saving rejects to file LayoutTests/platform/ios-wk2/TestExpectations.rej Failed to run "[u'/Volumes/Data/EWS/WebKit/Tools/Scripts/svn-apply', '--force', '--reviewer', u'Wenson Hsieh']" exit_code: 1 cwd: /Volumes/Data/EWS/WebKit Parsed 4 diffs from patch file(s). patching file LayoutTests/ChangeLog Hunk #1 succeeded at 1 with fuzz 1. patching file LayoutTests/fast/scrolling/ios/scroll-events-back-forward-expected.txt patching file LayoutTests/fast/scrolling/ios/scroll-events-back-forward.html patching file LayoutTests/platform/ios-wk2/TestExpectations Hunk #1 FAILED at 1373. 1 out of 1 hunk FAILED -- saving rejects to file LayoutTests/platform/ios-wk2/TestExpectations.rej Failed to run "[u'/Volumes/Data/EWS/WebKit/Tools/Scripts/svn-apply', '--force', '--reviewer', u'Wenson Hsieh']" exit_code: 1 cwd: /Volumes/Data/EWS/WebKit Updating OpenSource From https://git.webkit.org/git/WebKit f3e0ae51dfc..25a039e8ba7 master -> origin/master Partial-rebuilding .git/svn/refs/remotes/origin/master/.rev_map.268f45cc-cd09-0410-ab3c-d52691b4dbfc ... Currently at 255820 = f3e0ae51dfc689d072afbdcc9d1ea2e0f262d484 r255821 = 89a32102035c0a9464a9ffd164e294fd08d8505d r255822 = 25a039e8ba7905db1ecd9e401a94d665cd89b198 Done rebuilding .git/svn/refs/remotes/origin/master/.rev_map.268f45cc-cd09-0410-ab3c-d52691b4dbfc First, rewinding head to replay your work on top of it... Fast-forwarded master to refs/remotes/origin/master. Full output: https://webkit-queues.webkit.org/results/13317079
Chris Dumez
Comment 9 2020-02-05 10:08:08 PST
Committed r255825: <https://trac.webkit.org/changeset/255825>
Jason Lawrence
Comment 10 2020-02-06 08:14:13 PST
Reopening to attach new patch.
Jason Lawrence
Comment 11 2020-02-06 08:14:14 PST
Created attachment 389959 [details] Update Test Expectations
Truitt Savell
Comment 12 2020-02-06 08:21:31 PST
This was reopened in error
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