Bug 311759 – [macOS release] imported/w3c/web-platform-tests/event-timing/keydown is a flaky text failure.

• Status: NEW
• Component: New Bugs

[Diego De La Toba]

imported/w3c/web-platform-tests/event-timing/keydown is a flaky text failure on macOS release arm64.


HISTORY:
https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fevent-timing%2Fkeydown.html&architecture=x86_64


DIFF:
--- /Volumes/Data/worker/Apple-Tahoe-Release-AppleSilicon-WK2-Tests/build/layout-test-results/imported/w3c/web-platform-tests/event-timing/keydown-expected.txt
+++ /Volumes/Data/worker/Apple-Tahoe-Release-AppleSilicon-WK2-Tests/build/layout-test-results/imported/w3c/web-platform-tests/event-timing/keydown-actual.txt
@@ -1,4 +1,6 @@
 
 
-PASS Event Timing Keydown.
+Harness Error (TIMEOUT), message = null
 
+TIMEOUT Event Timing Keydown. Test timed out
+


DIFF URL:
https://build.webkit.org/results/Apple-Tahoe-Release-AppleSilicon-WK2-Tests/310789@main%20(3116)/imported/w3c/web-platform-tests/event-timing/keydown-pretty-diff.html


REPRODUCTION:
I was able to reproduce this failure on macOS 26.4 with the following:

run-webkit-tests --no-build --no-retry --no-show-results --exit-after-n-failures=1 --expect-pass --iterations=285 --force -f --release imported/w3c/web-platform-tests/event-timing/keydown.html

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

[Radar WebKit Bug Importer]

<rdar://problem/174354241>

[Diego De La Toba]

Test gardening pull request: https://github.com/WebKit/WebKit/pull/62300

[EWS]

Test gardening commit 310797@main (c5a2511f7684): <https://commits.webkit.org/310797@main>

Reviewed commits have been landed. Closing PR #62300 and removing active labels.

[Diego De La Toba]

Pull request: https://github.com/WebKit/WebKit/pull/62323

[Diego De La Toba]

Appears to be a timing issue in the test particularly with how it handles performance.now() and event timing 8 millisecond granularity.