Bug 228704 – [ Mac wk1 ] imported/w3c/web-platform-tests/mathml/relations/html5-tree/dynamic-childlist-002.html is a flaky failure

• Component: MathML
• Status: NEW

[Eric Hutchison]

imported/w3c/web-platform-tests/mathml/relations/html5-tree/dynamic-childlist-002.html 

is a flaky on Mac wk1.

History: https://results.webkit.org/?platform=mac&suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fmathml%2Frelations%2Fhtml5-tree%2Fdynamic-childlist-002.html

Results: https://build.webkit.org/results/Apple-Catalina-Release-WK1-Tests/r280520%20(4488)/results.html

Diff:
--- /Volumes/Data/worker/bigsur-debug-tests-wk1/build/layout-test-results/imported/w3c/web-platform-tests/mathml/relations/html5-tree/dynamic-childlist-002-expected.txt
+++ /Volumes/Data/worker/bigsur-debug-tests-wk1/build/layout-test-results/imported/w3c/web-platform-tests/mathml/relations/html5-tree/dynamic-childlist-002-actual.txt
@@ -1,5 +1,5 @@
 
-FAIL Appending and removing children to maction assert_approx_equals: block position (child 0) expected -26 +/- 1 but got -70
+FAIL Appending and removing children to maction assert_approx_equals: block position (child 0) expected -40 +/- 1 but got -58
 PASS Appending and removing children to menclose
 PASS Appending and removing children to merror
 FAIL Appending and removing children to mfrac assert_approx_equals: block position (child 0) expected 0 +/- 1 but got 2.375

Reproduced issue on r280528 using run-webkit-tests -1 -f --iterations 500 --exit-after-n-failures 1 imported/w3c/web-platform-tests/mathml/relations/html5-tree/dynamic-childlist-002.html.

[Radar WebKit Bug Importer]

<rdar://problem/81416237>

[Eric Hutchison]

Updated test expectations at https://trac.webkit.org/changeset/280539/webkit.