Bug 239405

Summary:	[ Mac ] fast/css/counters/element-removal-crash.xhtml is a flaky failure
Product:	WebKit	Reporter:	Karl Rackler <rackler>
Component:	CSS	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	hhjalmarsson, koivisto, webkit-bot-watchers-bugzilla, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified
See Also:	https://bugs.webkit.org/show_bug.cgi?id=183389 https://bugs.webkit.org/show_bug.cgi?id=242800

Description Karl Rackler 2022-04-15 14:28:44 PDT

Description:
fast/css/counters/element-removal-crash.xhtml 

The first failure affecting [ Mac ] that I see on the dashboard was 3/28/2022 at r292007 and has to do with WKWebView` API to control CSS "small viewport" `sv*` and "large viewport" `lv*` units which could have introduced the added flakiness. The change was made here https://bugs.webkit.org/attachment.cgi?id=455306&action=review.

REPRODUCTION STEPS
Due to the lack of spades, the closest to test is r292010.
I can reproduce this on r292010, but am unable to reproduce on r292002.

Command: 
run-webkit-tests --root --exit-after-n-failures 1 --exit-after-n-crashes-or-timeouts 1 --iterations 2000 --no-retry --force

Result: 
[756/2000] fast/css/counters/element-removal-crash.xhtml failed unexpectedly (text diff)
Exiting early after 2 failures. 756 tests run.


754 tests ran as expected, 2 didn't (1244 didn't run):


Unexpected flakiness: text-only failures (1)
  fast/css/counters/element-removal-crash.xhtml [ Failure Pass ]

History:
https://results.webkit.org/?suite=layout-tests&test=fast%2Fcss%2Fcounters%2Felement-removal-crash.xhtml&platform=mac&limit=50000K

Diff:
--- /Volumes/Data/worker/monterey-release-applesilicon-tests-wk2/build/layout-test-results/fast/css/counters/element-removal-crash-expected.txt
+++ /Volumes/Data/worker/monterey-release-applesilicon-tests-wk2/build/layout-test-results/fast/css/counters/element-removal-crash-actual.txt
@@ -1 +1,6 @@
+This page contains the following errors:
+
+error on line 32 at column 1: Extra content at the end of the document
+Below is a rendering of the page up to the first error.
+
 PASS

Comment 1 Radar WebKit Bug Importer 2022-04-15 14:29:26 PDT

<rdar://problem/91829382>

Comment 2 Karl Rackler 2022-04-15 14:44:53 PDT

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

Canonical link: https://commits.webkit.org/249689@main
git-svn-id: https://svn.webkit.org/repository/webkit/trunk@292922

Comment 3 Hercules Hjalmarsson 2022-07-15 18:01:27 PDT

*** Bug 242800 has been marked as a duplicate of this bug. ***