[Webkit-unassigned] [Bug 228168] New: REGRESSION(r279971): [ Mac , iOS ] imported/w3c/web-platform-tests/webmessaging/broadcastchannel/blobs.html is a flaky failure.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=228168

            Bug ID: 228168
           Summary: REGRESSION(r279971): [ Mac , iOS ]
                    imported/w3c/web-platform-tests/webmessaging/broadcast
                    channel/blobs.html is a flaky failure.
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ehutchison at apple.com

imported/w3c/web-platform-tests/webmessaging/broadcastchannel/blobs.html 

is a flaky failure on macOS and iOS. 

History: https://results.webkit.org/?platform=mac&platform=ios&suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fwebmessaging%2Fbroadcastchannel%2Fblobs.html

Diff: 
--- /Volumes/Data/worker/bigsur-release-applesilicon-tests-wk1/build/layout-test-results/imported/w3c/web-platform-tests/webmessaging/broadcastchannel/blobs-expected.txt
+++ /Volumes/Data/worker/bigsur-release-applesilicon-tests-wk1/build/layout-test-results/imported/w3c/web-platform-tests/webmessaging/broadcastchannel/blobs-actual.txt
@@ -1,4 +1,4 @@

-PASS Blobs work on BroadcastChannel
+FAIL Blobs work on BroadcastChannel assert_unreached: Reached unreachable code
 PASS Blobs work with workers on BroadcastChannel

Initial failure on r280017. 

Reproduced on r280151 with run-webkit-tests -f --iterations 500 --exit-after-n-failures 2 imported/w3c/web-platform-tests/webmessaging/broadcastchannel/blobs.html.
Reproduced on r280017 with run-webkit-tests -f --iterations 500 --exit-after-n-failures 2 -1 imported/w3c/web-platform-tests/webmessaging/broadcastchannel/blobs.html.
Reproduced on r279971 with run-webkit-tests -f --iterations 500 --exit-after-n-failures 2 --clobber-old-results -1 imported/w3c/web-platform-tests/webmessaging/broadcastchannel/blobs.html and run-webkit-tests -f --iterations 500 --exit-after-n-failures 2 --clobber-old-results imported/w3c/web-platform-tests/webmessaging/broadcastchannel/blobs.html.

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