[Webkit-unassigned] [Bug 174218] New: Layout Test svg/animations/smil-leak-list-property-instances.svg is flaky

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=174218

            Bug ID: 174218
           Summary: Layout Test
                    svg/animations/smil-leak-list-property-instances.svg
                    is flaky
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: SVG
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: jlewis3 at apple.com
                CC: zimmermann at kde.org

svg/animations/smil-leak-list-property-instances.svg has become a flaky failure on Mac WK1 testers according to the flakiness dashboard.

https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=svg%2Fanimations%2Fsmil-leak-list-property-instances.svg

It started with this build:
https://build.webkit.org/builders/Apple%20Sierra%20Debug%20WK1%20(Tests)/builds/2204

The last time the svg files were touched were with: https://trac.webkit.org/changeset/219045/webkit
However I have been unable to reproduce the failure locally and can't tell if the issue goes back further than this.

Current failure:
https://build.webkit.org/results/Apple%20El%20Capitan%20Debug%20WK1%20(Tests)/r219210%20(2308)/results.html
https://build.webkit.org/builders/Apple%20El%20Capitan%20Debug%20WK1%20(Tests)/builds/2308

Diff:
--- /Volumes/Data/slave/elcapitan-debug-tests-wk1/build/layout-test-results/svg/animations/animation-leak-list-property-instances-expected.txt
+++ /Volumes/Data/slave/elcapitan-debug-tests-wk1/build/layout-test-results/svg/animations/animation-leak-list-property-instances-actual.txt
@@ -1,3 +1,3 @@
 This test checks that transform animations in SVG elements do not cause the whole SVGDocument to leak.

-PASS
+FAIL: not enough live nodes freed: 13 vs 4 expected

Recently another test that was added that was extremely flaky was showing the same diff as its output. Attaching bug in See also section

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