Bug 192408

Summary: REGRESSION: Layout Test http/tests/security/cross-origin-css-resource-timing.html is flaky
Product: WebKit Reporter: Truitt Savell <tsavell>
Component: Tools / TestsAssignee: youenn fablet <youennf>
Status: RESOLVED FIXED    
Severity: Normal CC: achristensen, cdumez, commit-queue, jlewis3, lforschler, rniwa, ryanhaddad, webkit-bug-importer, youennf
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
Attachments:
Description Flags
Patch none

Description Truitt Savell 2018-12-05 10:15:26 PST
The following layout test is flaky on MacOS and iOS

http/tests/security/cross-origin-css-resource-timing.html

Probable cause:

Unknown regression point. the failure began 12/2 and is failing almost everywhere. I am unable to reproduce the issue locally with any command. 

Flakiness Dashboard:

https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=http%2Ftests%2Fsecurity%2Fcross-origin-css-resource-timing.html

Diff:
--- /Volumes/Data/slave/highsierra-release-tests-wk1/build/layout-test-results/http/tests/security/cross-origin-css-resource-timing-expected.txt
+++ /Volumes/Data/slave/highsierra-release-tests-wk1/build/layout-test-results/http/tests/security/cross-origin-css-resource-timing-actual.txt
@@ -1,3 +1,5 @@
+CONSOLE MESSAGE: Unhandled Promise Rejection: Error: assert_false: import expected false got true
+Test
 
-PASS CSS subresources of an opaque stylesheet should not populate resource timing entries 
+FAIL CSS subresources of an opaque stylesheet should not populate resource timing entries assert_false: import expected false got true
Comment 1 Truitt Savell 2018-12-05 10:18:53 PST
the regression point seems to be in the range of r238766-238782 while layout tests were broken.
Comment 2 Truitt Savell 2018-12-05 10:24:20 PST
looks like https://trac.webkit.org/changeset/238770/webkit may have something to do with it as it directly effected css resource timing.
Comment 3 Radar WebKit Bug Importer 2018-12-05 10:43:48 PST
<rdar://problem/46492201>
Comment 4 youenn fablet 2018-12-05 14:06:16 PST
Created attachment 356654 [details]
Patch
Comment 5 WebKit Commit Bot 2018-12-05 16:13:54 PST
Comment on attachment 356654 [details]
Patch

Clearing flags on attachment: 356654

Committed r238917: <https://trac.webkit.org/changeset/238917>
Comment 6 WebKit Commit Bot 2018-12-05 16:13:55 PST
All reviewed patches have been landed.  Closing bug.