231609 2021-10-12 13:46:27 -0700 [ iOS15 iPad Debug ] imported/w3c/web-platform-tests/webmessaging/MessagePort_onmessage_start.any.worker.html is a flaky failure (reached unreachable code) 2021-10-22 09:05:31 -0700 1 1 1 Unclassified WebKit New Bugs WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 ehutchison cdumez achristensen cdumez clopez ehutchison ews-watchlist ggaren sam webkit-bot-watchers-bugzilla webkit-bug-importer youennf oldest_to_newest 1803342 0 ehutchison 2021-10-12 13:46:27 -0700 imported/w3c/web-platform-tests/webmessaging/MessagePort_onmessage_start.any.worker.html is a flaky failure on iOS15 Debug on iPad History: https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fwebmessaging%2FMessagePort_onmessage_start.any.worker.html Build: https://build.webkit.org/#/builders/265/builds/63 Results: https://build.webkit.org/results/Apple-iPadOS-15-Simulator-Debug-WK2-Tests/r283979%20(63)/results.html Diff: --- /Volumes/Data/worker/ipados-simulator-15-debug-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/webmessaging/MessagePort_onmessage_start.any.worker-expected.txt +++ /Volumes/Data/worker/ipados-simulator-15-debug-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/webmessaging/MessagePort_onmessage_start.any.worker-actual.txt @@ -1,3 +1,3 @@ -PASS MessageChannel: port.onmessage enables message queue +FAIL MessageChannel: port.onmessage enables message queue assert_unreached: Reached unreachable code 1803343 1 webkit-bug-importer 2021-10-12 13:49:25 -0700 <rdar://problem/84164701> 1803349 2 ehutchison 2021-10-12 13:53:19 -0700 Updated test expectations at https://trac.webkit.org/changeset/284020/webkit 1806166 3 cdumez 2021-10-19 11:06:38 -0700 The test has: setTimeout(t.unreached_func(), 100); So I think this means that it took more than 100ms for the message event to get dispatched. This is not too surprising that this test would be flaky, especially on slower configuration. The WPT test needs fixing here I believe. 1806170 4 cdumez 2021-10-19 11:11:59 -0700 Upstream pull request: https://github.com/web-platform-tests/wpt/pull/31317 1807135 5 442021 cdumez 2021-10-21 07:53:57 -0700 Created attachment 442021 Patch 1807137 6 ews-watchlist 2021-10-21 07:55:07 -0700 This patch modifies the imported WPT tests. Please ensure that any changes on the tests (not coming from a WPT import) are exported to WPT. Please see https://trac.webkit.org/wiki/WPTExportProcess 1807682 7 cdumez 2021-10-22 08:30:01 -0700 ping review? 1807697 8 ews-feeder 2021-10-22 09:05:28 -0700 Committed r284686 (243406@main): <https://commits.webkit.org/243406@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 442021. 442021 2021-10-21 07:53:57 -0700 2021-10-22 09:05:29 -0700 Patch bug-231609-20211021075356.patch text/plain 4192 cdumez U3VidmVyc2lvbiBSZXZpc2lvbjogMjg0NjA0CmRpZmYgLS1naXQgYS9MYXlvdXRUZXN0cy9DaGFu Z2VMb2cgYi9MYXlvdXRUZXN0cy9DaGFuZ2VMb2cKaW5kZXggZmZmYTg3MzJhZWM2OTU2NTM5MzMw N2QzM2U0NzI0MDQ3Y2U3NDAzZC4uYmI1YmQxZThmODliNDczODYyOGEwZTA1ZTExMThjZDA1YTY1 ZWRjMSAxMDA2NDQKLS0tIGEvTGF5b3V0VGVzdHMvQ2hhbmdlTG9nCisrKyBiL0xheW91dFRlc3Rz L0NoYW5nZUxvZwpAQCAtMSwzICsxLDE1IEBACisyMDIxLTEwLTIxICBDaHJpcyBEdW1leiAgPGNk dW1lekBhcHBsZS5jb20+CisKKyAgICAgICAgWyBpT1MxNSBpUGFkIERlYnVnIF0gaW1wb3J0ZWQv dzNjL3dlYi1wbGF0Zm9ybS10ZXN0cy93ZWJtZXNzYWdpbmcvTWVzc2FnZVBvcnRfb25tZXNzYWdl X3N0YXJ0LmFueS53b3JrZXIuaHRtbCBpcyBhIGZsYWt5IGZhaWx1cmUgKHJlYWNoZWQgdW5yZWFj aGFibGUgY29kZSkKKyAgICAgICAgaHR0cHM6Ly9idWdzLndlYmtpdC5vcmcvc2hvd19idWcuY2dp P2lkPTIzMTYwOQorICAgICAgICA8cmRhcjovL3Byb2JsZW0vODQxNjQ3MDE+CisKKyAgICAgICAg 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