Bug 221229

Summary:	REGRESSION [ Big Sur WK2 ] imported/w3c/web-platform-tests/worklets/layout-worklet-service-worker-interception.https.html is flakey text failing
Product:	WebKit	Reporter:	Robert Jenner <jenner>
Component:	New Bugs	Assignee:	Nobody <webkit-unassigned>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	cdumez, webkit-bot-watchers-bugzilla, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Description Robert Jenner 2021-02-01 14:51:29 PST

imported/w3c/web-platform-tests/worklets/layout-worklet-service-worker-interception.https.html

Is a flakey text failure on macOS Big Sur WK2. 

HISTORY:
https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fworklets%2Flayout-worklet-service-worker-interception.https.html&platform=mac

DIFF URL:
https://build.webkit.org/results/Apple-BigSur-Release-WK2-Tests/r272153%20(1318)/imported/w3c/web-platform-tests/worklets/layout-worklet-service-worker-interception.https-diff.txt

DIFF TEXT:
--- /Volumes/Data/slave/bigsur-release-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/worklets/layout-worklet-service-worker-interception.https-expected.txt
+++ /Volumes/Data/slave/bigsur-release-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/worklets/layout-worklet-service-worker-interception.https-actual.txt
@@ -1 +1,5 @@
 
+FAIL addModule() on a controlled document should be intercepted by a service worker. assert_equals: expected (string) "RESOLVED" but got (object) object "[object Object]"
+FAIL addModule() on a non-controlled document should not be intercepted by a service worker even if the script is under the service worker scope. assert_equals: expected (string) "REJECTED" but got (object) object "[object Object]"
+FAIL Static import should be intercepted by a service worker. assert_equals: expected (string) "RESOLVED" but got (object) object "[object Object]"
+

Comment 1 Radar WebKit Bug Importer 2021-02-01 14:51:57 PST

<rdar://problem/73847820>

Comment 2 Robert Jenner 2021-02-01 16:46:59 PST

Bug/Crash reproducible in r272170

Produced bug using test:

run-webkit-test imported/w3c/web-platform-tests/worklets/layout-worklet-service-worker-interception.https.html  --iterations 1000 -f

Attempted to bisect. Regressed at least 400 builds back. Was able to reproduce the bug  almost every time, but was not able to find the regression point.

Comment 3 Chris Dumez 2021-02-11 13:34:37 PST

<https://trac.webkit.org/changeset/272745>