Bug 232276

Summary:	Regression(r283935): [ macOS wk1 ] imported/w3c/web-platform-tests/html/interaction/focus/the-autofocus-attribute/spin-by-blocking-style-sheet.html is a flaky failure
Product:	WebKit	Reporter:	ayumi_kojima
Component:	New Bugs	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	cdumez, ntim, webkit-bot-watchers-bugzilla, webkit-bug-importer, wenson_hsieh
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Description ayumi_kojima 2021-10-25 15:06:49 PDT

imported/w3c/web-platform-tests/html/interaction/focus/the-autofocus-attribute/spin-by-blocking-style-sheet.html

Is a flaky failure on macOS wk1. The test is especially flaky and almost constantly failing on Big Sur E wk1 Release.

History: https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fhtml%2Finteraction%2Ffocus%2Fthe-autofocus-attribute%2Fspin-by-blocking-style-sheet.html

Result page: https://build.webkit.org/results/Apple-BigSur-Release-AppleSilicon-WK1-Tests/r284819%20(5780)/results.html

Diff:

--- /Volumes/Data/worker/bigsur-release-applesilicon-tests-wk1/build/layout-test-results/imported/w3c/web-platform-tests/html/interaction/focus/the-autofocus-attribute/spin-by-blocking-style-sheet-expected.txt
+++ /Volumes/Data/worker/bigsur-release-applesilicon-tests-wk1/build/layout-test-results/imported/w3c/web-platform-tests/html/interaction/focus/the-autofocus-attribute/spin-by-blocking-style-sheet-actual.txt
@@ -1,4 +1,6 @@
 
 
-PASS Script-blocking style sheet should pause flushing autofocus candidates.
+Harness Error (TIMEOUT), message = null
 
+TIMEOUT Script-blocking style sheet should pause flushing autofocus candidates. Test timed out
+

Comment 1 Radar WebKit Bug Importer 2021-10-25 15:07:11 PDT

<rdar://problem/84633007>

Comment 2 ayumi_kojima 2021-10-25 15:09:52 PDT

According to the history, the test started becoming flaky at around r283935.

Comment 3 ayumi_kojima 2021-10-25 15:10:10 PDT

Marked test expectations https://trac.webkit.org/changeset/284840/webkit

Comment 4 ayumi_kojima 2021-10-25 17:20:06 PDT

I was able to reproduce the failure locally at TOT using run-webkit-tests -force -1 imported/w3c/web-platform-tests/html/interaction/focus/the-autofocus-attribute/spin-by-blocking-style-sheet.html  --iterations 50 --exit-after-n-failures 1

Comment 5 ayumi_kojima 2021-10-28 09:12:28 PDT

The test failed with r283935 and passed with r283934.

Comment 6 Chris Dumez 2021-11-08 15:09:27 PST

This may be a dupe of Bug 231918. I cannot reproduce however so I cannot confirm.

Comment 7 Chris Dumez 2021-11-08 15:31:57 PST

(In reply to Chris Dumez from comment #6)
> This may be a dupe of Bug 231918. I cannot reproduce however so I cannot
> confirm.

No, I don't think it is a dupe after all.