Bug 172255

The test imported/w3c/web-platform-tests/html/browsers/windows/browsing-context.html is a flaky failure on both Wk1 and wk2 on Sierra Debug. https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=imported%2Fw3c%2Fweb-platform-tests%2Fhtml%2Fbrowsers%2Fwindows%2Fbrowsing-context.html https://build.webkit.org/results/Apple%20Sierra%20Debug%20WK2%20(Tests)/r216991%20(1055)/results.html https://build.webkit.org/builders/Apple%20Sierra%20Debug%20WK2%20(Tests)/builds/1055 diff: --- /Volumes/Data/slave/sierra-debug-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/html/browsers/windows/browsing-context-expected.txt +++ /Volumes/Data/slave/sierra-debug-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/html/browsers/windows/browsing-context-actual.txt @@ -2,5 +2,5 @@ FAIL Check that browsing context has new, ready HTML document assert_equals: The document's encoding should be 'UTF-8'. expected "UTF-8" but got "windows-1252" PASS Check that new document nodes extant, empty PASS Check the document properties corresponding to the creator browsing context -FAIL Check the history.length of the created browsing context assert_equals: The history.length should be 1. expected 1 but got 100 +FAIL Check the history.length of the created browsing context assert_equals: The history.length should be 1. expected 1 but got 90 I was able to reproduce the failure on Sierra Debug with: run-webkit-tests imported/w3c/web-platform-tests/html/browsers/windows/browsing-context.html --iterations=100 --no-retry-failure --debug