Bug 180160

Summary: http/tests/contentextensions/two-distinguishable-css-display-none-rules-on-main-resource.html is flaky.
Product: WebKit Reporter: Matt Lewis <jlewis3>
Component: New BugsAssignee: Nobody <webkit-unassigned>
Status: NEW ---    
Severity: Normal CC: achristensen, simon.fraser, zalan
Priority: P2    
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
See Also: https://bugs.webkit.org/show_bug.cgi?id=180277

Description Matt Lewis 2017-11-29 12:29:37 PST
http/tests/contentextensions/two-distinguishable-css-display-none-rules-on-main-resource.html is flaky on macOS High Sierra Release WK2 according to the flakiness dashboard:

https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=http%2Ftests%2Fcontentextensions%2Ftwo-distinguishable-css-display-none-rules-on-main-resource.html

https://build.webkit.org/results/Apple%20High%20Sierra%20Release%20WK2%20(Tests)/r225269%20(1419)/results.html
https://build.webkit.org/builders/Apple%20High%20Sierra%20Release%20WK2%20(Tests)/builds/1419

diff:
--- /Volumes/Data/slave/highsierra-release-tests-wk2/build/layout-test-results/http/tests/contentextensions/two-distinguishable-css-display-none-rules-on-main-resource-expected.txt
+++ /Volumes/Data/slave/highsierra-release-tests-wk2/build/layout-test-results/http/tests/contentextensions/two-distinguishable-css-display-none-rules-on-main-resource-actual.txt
@@ -1,3 +1,9 @@
 This text should be visible.
 
+This text should not be visible!!! 1
+
+This text should not be visible!!! 2
+
+This text should not be visible!!! 3
+
 This text should be visible.
Comment 1 Alexey Proskuryakov 2017-12-01 10:57:55 PST
Looks like it's been happening for at least a month, quite possibly longer. On slower bots like GuardMalloc, this test fails very frequently, but then again, all content extension tests fail very frequently on those.