229565 2021-08-26 09:13:29 -0700 [ iOS MacOS ] imported/w3c/web-platform-tests/encoding/sharedarraybuffer.https.html is a flaky failure 2021-08-26 09:59:38 -0700 1 1 1 Unclassified WebKit New Bugs WebKit Nightly Build Unspecified Unspecified RESOLVED DUPLICATE 229501 https://bugs.webkit.org/show_bug.cgi?id=229501 InRadar P2 Normal --- 1 ayumi_kojima webkit-unassigned achristensen beidson cdumez webkit-bot-watchers-bugzilla webkit-bug-importer oldest_to_newest 1787618 0 ayumi_kojima 2021-08-26 09:13:29 -0700 imported/w3c/web-platform-tests/encoding/sharedarraybuffer.https.html Is a flaky failure on iOS (Release & Debug) and MacOS Debug. History: https://results.webkit.org/?suite=layout-tests&test=imported/w3c/web-platform-tests/encoding/sharedarraybuffer.https.html The test started showing up on EWS as a flaky test. https://ews-build.webkit.org/#/builders/51/builds/19853 Result page: https://build.webkit.org/results/Apple-BigSur-Debug-WK2-Tests/r281618%20(3440)/results.html Diff: --- /Volumes/Data/worker/bigsur-debug-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/encoding/sharedarraybuffer.https-expected.txt +++ /Volumes/Data/worker/bigsur-debug-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/encoding/sharedarraybuffer.https-actual.txt @@ -1,5 +1,5 @@ - -FAIL decoding SharedArrayBuffer assert_throws_js: constructing TextDecoder with SharedArrayBuffer view should throw function "() => { - decoder.decode(new Uint8Array(buffer)); - }" did not throw - +layer at (0,0) size 800x600 + RenderView at (0,0) size 800x600 +layer at (0,0) size 800x600 + RenderBlock {HTML} at (0,0) size 800x600 + RenderBody {BODY} at (8,8) size 784x584 1787619 1 webkit-bug-importer 2021-08-26 09:13:53 -0700 <rdar://problem/82393158> 1787622 2 ayumi_kojima 2021-08-26 09:16:22 -0700 This bug might have to same root case as https://bugs.webkit.org/show_bug.cgi?id=229501 since the diff, history, and affected configuration look very similar. 1787630 3 ayumi_kojima 2021-08-26 09:24:48 -0700 Updated test expectations: https://trac.webkit.org/changeset/281626/webkit 1787639 4 cdumez 2021-08-26 09:32:55 -0700 (In reply to ayumi_kojima from comment #2) > This bug might have to same root case as > https://bugs.webkit.org/show_bug.cgi?id=229501 since the diff, history, and > affected configuration look very similar. Yes, this is very likely the same issue. I suspect WebKitTestRunner's injected bundle doesn't deal well with process swaps on network response (due to COOP). 1787658 5 ayumi_kojima 2021-08-26 09:59:38 -0700 *** This bug has been marked as a duplicate of bug 229501 ***