Bug 261344

requestidlecallback/requestidlecallback-does-not-block-timer.html This test is a flaky text failure on macOS wk2. HISTORY: https://results.webkit.org/?suite=layout-tests&suite=layout-tests&test=requestidlecallback%2Frequestidlecallback-in-page-cache.html&test=requestidlecallback%2Frequestidlecallback-does-not-block-timer.html TEXT DIFF: On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". -PASS didFireTimer is true -PASS idleDeadline.timeRemaining() > 0 is true -PASS idleDeadline.timeRemaining() is 0 -PASS didRunIdleCallback is true +FAIL didRunIdleCallback should be true. Was false. PASS successfullyParsed is true +Some tests failed. TEST COMPLETE DIFF URL: https://build.webkit.org/results/Apple-Ventura-Debug-WK2-GPUProcess-Tests/267753@main%20(3505)/requestidlecallback/requestidlecallback-does-not-block-timer-pretty-diff.html REPRODUCIBILITY: I was able to reproduce this issue on macOS Ventura (13.5, 22G74/arm64) ToT using the following command: run-webkit-tests --verbose --clobber-old-results --iterations 2000 --child-processes 10 -f --exit-after-n-failures 1 requestidlecallback/requestidlecallback-does-not-block-timer.html REGRESSION: This test has been flaky since its introduction at 267029@main.