Bug 206961

Summary: [ Mojave wk2 ] media/media-fragments/TC0035.html is flaky failing.
Product: WebKit Reporter: Jason Lawrence <Lawrence.j>
Component: MediaAssignee: Nobody <webkit-unassigned>
Status: NEW ---    
Severity: Normal CC: tsavell, webkit-bot-watchers-bugzilla, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
See Also: https://bugs.webkit.org/show_bug.cgi?id=187557
https://bugs.webkit.org/show_bug.cgi?id=207143
Attachments:
Description Flags
Update Test Expectations none

Description Jason Lawrence 2020-01-29 13:24:31 PST 
media/media-fragments/TC0035.html

Description: 
This test is flaky failing on Mojave wk2.

Results:
https://results.webkit.org/?suite=layout-tests&test=media%2Fmedia-fragments%2FTC0035.html

Diff:
--- /Volumes/Data/slave/mojave-release-tests-wk2/build/layout-test-results/media/media-fragments/TC0035-expected.txt
+++ /Volumes/Data/slave/mojave-release-tests-wk2/build/layout-test-results/media/media-fragments/TC0035-actual.txt
@@ -4,7 +4,7 @@
 Fragment: '%74=3'
 Comment: The media is requested from 3 seconds to the end. Note: %74 is equivalent to t.
 EVENT(canplaythrough)
-EXPECTED (video.currentTime == '3') OK
+EXPECTED (video.currentTime == '3'), OBSERVED '0' FAIL
 RUN(video.play())
 EVENT(pause)
 EXPECTED (video.currentTime - fragmentEndTime <= '0.75') OK
Comment 1 Radar WebKit Bug Importer 2020-01-29 13:24:55 PST 
<rdar://problem/59004140>
Comment 2 Jason Lawrence 2020-01-29 13:36:20 PST 
Created attachment 389178 [details]
Update Test Expectations
Comment 3 Truitt Savell 2020-01-29 13:49:31 PST 
Comment on attachment 389178 [details]
Update Test Expectations

Clearing flags on attachment: 389178

Committed r255382: <https://trac.webkit.org/changeset/255382>
Comment 4 Jason Lawrence 2020-02-18 17:24:45 PST 
I am able to reproduce this issue with a debug build of r256864 using this command:
run-webkit-tests media/media-fragments/TC0035.html --iterations 3000 --exit-after-n-failures 5 -f --force --debug -g

[2081/3000] media/media-fragments/TC0035.html failed unexpectedly (test timed out, text diff)

2999 tests ran as expected, 1 didn't: