REGRESSION (r237479-237484): [ MacOS ] Layout Test svg/animations/svglength-element-removed-crash.svg is failing

• Component: Tools / Tests
• Status: RESOLVED DUPLICATE

[Truitt Savell]

The following layout test is failing on Mojave and High Sierra

svg/animations/svglength-element-removed-crash.svg

Probable cause:

Problem is a recent regression. I was able to reproduce it with:
run-webkit-tests --root testbuild-237484 svg/animations/svglength-element-removed-crash.svg --iterations 500 -f

due to several revisions being built together this left me with a range of possible revisions between r237479-237484. 

Flakiness Dashboard:

https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=svg%2Fanimations%2Fsvglength-element-removed-crash.svg

Diff:
--- /Volumes/Data/slave/mojave-release-tests-wk2/build/layout-test-results/svg/animations/svglength-element-removed-crash-expected.txt
+++ /Volumes/Data/slave/mojave-release-tests-wk2/build/layout-test-results/svg/animations/svglength-element-removed-crash-actual.txt
@@ -1 +1 @@
-PASS x = 10
+FAIL: -150 extra live node(s) x = 10

[Radar WebKit Bug Importer]

<rdar://problem/45653754>

[Matt Lewis]

This test was already marked as skip at one point due to being a frequent flake in:
https://bugs.webkit.org/show_bug.cgi?id=173178

While the diffs are different, they seem to be very similar.

[Said Abou-Hallawa]

This should be fixed by removing the SVG tear-off object. https://bugs.webkit.org/show_bug.cgi?id=191237

*** This bug has been marked as a duplicate of bug 191237 ***