Bug 309370 – [macOS iOS] fast/css/vertical-text-overflow-ellipsis-text-align-center.html is a flaky text failure.

• Status: NEW
• Component: New Bugs

[Diego De La Toba]

fast/css/vertical-text-overflow-ellipsis-text-align-center.html is a flaky text failure on macOS and iOS.


HISTORY:
https://results.webkit.org/?suite=layout-tests&test=fast%2Fcss%2Fvertical-text-overflow-ellipsis-text-align-center.html
Failures appear constant since failures constantly occur on first iteration and then become flaky.


DIFF:
--- /Volumes/Data/Builds/Ios/Production/TestBuild308797@main/layout-test-results/fast/css/vertical-text-overflow-ellipsis-text-align-center-expected.txt
+++ /Volumes/Data/Builds/Ios/Production/TestBuild308797@main/layout-test-results/fast/css/vertical-text-overflow-ellipsis-text-align-center-actual.txt
@@ -77,14 +77,14 @@
     RenderText {#text} at (61,-405) size 20x714
       text run at (61,-404) width 715 RTL: "em ipsum dolor sit amet, consectetur adipiscing elit. Vivamus vitae eros non libero faucibus sagittis sed ut eros."
     RenderBR {BR} at (61,-405) size 20x1
-layer at (8,2280) size 32x310 clip at (9,2281) size 30x308 scrollY 458 scrollHeight 766
+layer at (8,2280) size 32x310 clip at (9,2281) size 30x308 scrollY 433 scrollHeight 766
   RenderBlock {DIV} at (0,2272) size 32x311 [border: (1px solid #000000)]
     RenderText {#text} at (11,123) size 19x186
       text run at (11,123) width 186 RTL: "Lorem ipsum dolor sit amet, "
     RenderImage {IMG} at (1,98) size 25x26
     RenderText {#text} at (11,-457) size 19x556
       text run at (11,-456) width 555 RTL: " consectetur adipiscing elit. Vivamus vitae eros non libero faucibus sagittis sed ut eros."
-layer at (8,2652) size 32x310 clip at (9,2653) size 30x308 scrollY 454 scrollHeight 762
+layer at (8,2652) size 32x310 clip at (9,2653) size 30x308 scrollY 429 scrollHeight 762
   RenderBlock {DIV} at (0,2643) size 32x311 [border: (1px solid #000000)]
     RenderText {#text} at (11,31) size 19x278
       text run at (11,31) width 278 RTL: "Lorem ipsum dolor sit amet, consectetur ad"


DIFF URL:
https://build.webkit.org/results/Apple-Tahoe-Release-AppleSilicon-WK2-Tests/308798@main%20(2224)/fast/css/vertical-text-overflow-ellipsis-text-align-center-pretty-diff.html


REPRODUCTION:
I reproduced this failure on iOS and macOS with the following:

run-webkit-tests --no-build --no-retry --no-show-results --expect-pass --iterations=1000 --force --release fast/css/vertical-text-overflow-ellipsis-text-align-center.html

I am going to mark expectations as pass fail while this pends investigation.

[Radar WebKit Bug Importer]

<rdar://problem/171925428>

[Diego De La Toba]

Pull request: https://github.com/WebKit/WebKit/pull/60086

[EWS]

Test gardening commit 308819@main (3bba2597ecb5): <https://commits.webkit.org/308819@main>

Reviewed commits have been landed. Closing PR #60086 and removing active labels.

[Diego De La Toba]

There visible regression in the history but test fails first run with all local testing, so I'm unable to find a regression point. However the flakiness does seem to be timing related.

[Diego De La Toba]

Pull request: https://github.com/WebKit/WebKit/pull/60104