Bug 207728

Summary:	[ Mac Release wk2 ] accessibility/press-targets-center-point.html is flaky failing.
Product:	WebKit	Reporter:	Jason Lawrence <Lawrence.j>
Component:	Accessibility	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	webkit-bot-watchers-bugzilla, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Mac
OS:	macOS 10.15

Description Jason Lawrence 2020-02-13 16:30:46 PST

accessibility/press-targets-center-point.html

Description:
This test is flaky failing on Mac Release wk2. The oldest flaky crash is on r254929.


There is a single Catalina wk1 Release failure on r252058, leaving it out at this time because every other of the failures seem to be isolated to wk2.

History:
https://results.webkit.org/?suite=layout-tests&suite=layout-tests&suite=layout-tests&test=accessibility%2Fpress-targets-center-point.html&test=http%2Fwpt%2Fpreload%2Fchange-link-rel-attribute.html&test=webgpu%2Fwhlsl%2Freturn-local-variable.html&platform=mac&limit=50000

Diff:
--- /Volumes/Data/slave/catalina-release-tests-wk2/build/layout-test-results/accessibility/press-targets-center-point-expected.txt
+++ /Volumes/Data/slave/catalina-release-tests-wk2/build/layout-test-results/accessibility/press-targets-center-point-actual.txt
@@ -1,3 +1,4 @@
+CONSOLE MESSAGE: line 63: TypeError: null is not an object (evaluating 'accessibilityController.accessibleElementById("t" + i).press')
 target
 Actual: (89, 18)
 Expected: (89, 18)

Comment 1 Radar WebKit Bug Importer 2020-02-13 16:31:05 PST

<rdar://problem/59443073>

Comment 2 Jason Lawrence 2020-02-13 16:37:29 PST

I have marked this test as failing while this issue is being investigated.
https://trac.webkit.org/changeset/256573/webkit

Comment 3 Jason Lawrence 2020-02-14 09:10:20 PST

I am able to reproduce this issue with r256601 using the command below. 
run-webkit-tests accessibility/press-targets-center-point.html --force -f --iterations 5000 -g --exit-after-n-failures


[71/5000] accessibility/press-targets-center-point.html failed unexpectedly (text diff)
[399/5000] accessibility/press-targets-center-point.html failed unexpectedly (text diff)
[423/5000] accessibility/press-targets-center-point.html failed unexpectedly (text diff)
[516/5000] accessibility/press-targets-center-point.html failed unexpectedly (text diff)
[818/5000] accessibility/press-targets-center-point.html failed unexpectedly (text diff)
Exiting early after 5 failures. 813 tests run.

808 tests ran as expected, 5 didn't (4187 didn't run):