Bug 172666

Summary: fast/images/slower-decoding-than-animation-image.html is flaky.
Product: WebKit Reporter: Matt Lewis <jlewis3>
Component: New BugsAssignee: Nobody <webkit-unassigned>
Status: NEW ---    
Severity: Normal CC: ryanhaddad, sabouhallawa, simon.fraser
Priority: P2    
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   

Description Matt Lewis 2017-05-26 15:22:20 PDT
The test fast/images/slower-decoding-than-animation-image.html seems to be flaky. It's failing intermittently on all Mac debug builds according to the flakiness dashboard. 

The first failure seems to be on from this build, but I don't think the revision is related:
https://build.webkit.org/builders/Apple%20El%20Capitan%20Debug%20WK2%20(Tests)/builds/912

https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=fast%2Fimages%2Fslower-decoding-than-animation-image.html

Most recent failure:
https://build.webkit.org/builders/Apple%20Sierra%20Debug%20WK2%20(Tests)/builds/1226
https://build.webkit.org/results/Apple%20Sierra%20Debug%20WK2%20(Tests)/r217498%20(1226)/results.html


Diff:
--- /Volumes/Data/slave/sierra-debug-tests-wk2/build/layout-test-results/fast/images/slower-decoding-than-animation-image-expected.txt
+++ /Volumes/Data/slave/sierra-debug-tests-wk2/build/layout-test-results/fast/images/slower-decoding-than-animation-image-actual.txt
@@ -3,7 +3,7 @@
 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
 
 
-PASS internals.imageFrameIndex(image) is 1
+FAIL internals.imageFrameIndex(image) should be 1. Was 2.
 PASS successfullyParsed is true
 
 TEST COMPLETE


I have been unable to consistently reproduce the failure locally on either platform.
Comment 1 Ryan Haddad 2017-05-31 16:51:25 PDT
I wonder if this could be related to this change from the day before the first failure you linked https://trac.webkit.org/changeset/216154/webkit
Comment 2 Matt Lewis 2017-06-02 09:18:34 PDT
Marked test as flaky.
https://trac.webkit.org/changeset/217713/webkit
Comment 3 Matt Lewis 2017-09-21 13:54:31 PDT
This has started to be flaky on El Capitan Debug WK1 as well according to the dashboard:

first failure:
https://build.webkit.org/builders/Apple%20El%20Capitan%20Debug%20WK1%20(Tests)/builds/3693

The Diff is the same.