208832 2020-03-09 14:33:12 -0700 [ macOS ] imported/w3c/web-platform-tests/webmessaging/Channel_postMessage_Blob.htm is flaky failing 2020-08-11 15:34:20 -0700 1 1 1 Unclassified WebKit New Bugs WebKit Nightly Build Unspecified Unspecified NEW InRadar P2 Normal --- 1 jacob_uphoff webkit-unassigned hector_i_lopez webkit-bot-watchers-bugzilla webkit-bug-importer oldest_to_newest 1627966 0 jacob_uphoff 2020-03-09 14:33:12 -0700 imported/w3c/web-platform-tests/webmessaging/Channel_postMessage_Blob.htm This test has become a flaky failure pretty recently on macOS wk1 & wk2 on both debug and release. History: https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fwebmessaging%2FChannel_postMessage_Blob.htm Diff: --- /Volumes/Data/slave/catalina-debug-tests-wk1/build/layout-test-results/imported/w3c/web-platform-tests/webmessaging/Channel_postMessage_Blob-expected.txt +++ /Volumes/Data/slave/catalina-debug-tests-wk1/build/layout-test-results/imported/w3c/web-platform-tests/webmessaging/Channel_postMessage_Blob-actual.txt @@ -1,3 +1,3 @@ -PASS Test Description: Messages can contain Blobs. +FAIL Test Description: Messages can contain Blobs. assert_unreached: Reading blob failed Reached unreachable code 1627967 1 webkit-bug-importer 2020-03-09 14:33:51 -0700 <rdar://problem/60243009> 1679607 2 hector_i_lopez 2020-08-11 15:34:20 -0700 imported/w3c/web-platform-tests/webmessaging/Channel_postMessage_Blob.htm Test is flaky failure on macOS as documented before but also now on iOS wk2. The first occurrence of failure according to history for macOS is at r253080 nut more consistently after r258078. The first occurrence of failure for iOS is at r259421. History: https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fwebmessaging%2FChannel_postMessage_Blob.htm&limit=50000&platform=mac&platform=ios Diff: --- /Volumes/Data/slave/ios-simulator-13-release-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/webmessaging/Channel_postMessage_Blob-expected.txt +++ /Volumes/Data/slave/ios-simulator-13-release-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/webmessaging/Channel_postMessage_Blob-actual.txt @@ -1,3 +1,3 @@ -PASS Test Description: Messages can contain Blobs. +FAIL Test Description: Messages can contain Blobs. assert_unreached: Reading blob failed Reached unreachable code Test expectation added while investigated: https://trac.webkit.org/changeset/265527/webkit