Bug 257336 – imported/w3c/web-platform-tests/css/css-tables/visibility-collapse-row-003-dynamic.html is a flaky failure

• Status: NEW
• Component: Tools / Tests

[Robert Jenner]

imported/w3c/web-platform-tests/css/css-tables/visibility-collapse-row-003-dynamic.html

is a flaky text failure on all platforms since re-importing from upstream. 

HISTORY:
https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fcss%2Fcss-tables%2Fvisibility-collapse-row-003-dynamic.html

DIFF TEXT:
 PASS row visibility:collapse doesn't change table width, unlike display:none
-FAIL row visibility:collapse changes table height, unlike visibility:hidden assert_equals: row visibility:collapse changes table height, unlike visibility:hidden expected 116 but got 222
+FAIL row visibility:collapse changes table height, unlike visibility:hidden assert_equals: row visibility:collapse changes table height, unlike visibility:hidden expected 116 but got 307
 

DIFF URL:
https://ews-build.s3-us-west-2.amazonaws.com/macOS-AppleSilicon-Ventura-Debug-WK2-Tests-EWS/57d36e7f-6352/imported/w3c/web-platform-tests/css/css-tables/visibility-collapse-row-003-dynamic-pretty-diff.html

[Radar WebKit Bug Importer]

<rdar://problem/109841082>

[Robert Jenner]

This is also slowing down EWS, currently observed as the only preexisting failure on macOS:

https://ews-build.webkit.org/#/builders/17

[Robert Jenner]

I was able to reproduce this at Ventura ToT running the test as follows:

run-webkit-tests imported/w3c/web-platform-tests/css/css-tables/visibility-collapse-row-003-dynamic.html --iterations 100

This test has been in this state since it was re-imported/resynced at https://commits.webkit.org/264228@main

[EWS]

Test gardening commit 264525@main (283047c0aa40): <https://commits.webkit.org/264525@main>

Reviewed commits have been landed. Closing PR #14355 and removing active labels.

[Karl Dubost]

Created attachment 466561 [details]
rendering in safari, firefox, chrome

Safari Technology Preview  171           18616.1.15
Firefox Nightly            115.0a1       11523.5.21
Google Chrome Canary       115.0.5790.3  5790.3

[Karl Dubost]

This is probably a duplicate of Bug 8735