1698687 - Fix and re-enable dom/svg/test/test_SVGLengthList.xhtml for Fission TSan

Status: RESOLVED WORKSFORME

(Core :: SVG, defect, P5)

Description

[Chris Peterson [:cpeterson]]

ahal tried to enable mochitest-plain for Fission on linux1804-64-tsan/opt in bug 1694833. Unfortunately, there are some new TSan test failures with Fission. mochitest-plain already runs on linux1804-64-tsan/opt for e10s (non-Fission), so Fission is presumably causing these new failures.

Try run:

https://treeherder.mozilla.org/jobs?repo=try&revision=c50dd851c95cc3b8d0cd1e6cd4889b6a6a4d842a&searchStr=tsan&group_state=expanded

13 possible regressions (and 17 known issues):

https://treeherder.mozilla.org/push-health/push?repo=try&revision=c50dd851c95cc3b8d0cd1e6cd4889b6a6a4d842a

dom/svg/test/test_SVGLengthList.xhtml

[task 2021-03-12T15:40:29.331Z] 15:40:29     INFO - TEST-UNEXPECTED-FAIL | dom/svg/test/test_SVGLengthList.xhtml | Test timed out. 
[task 2021-03-12T15:40:29.331Z] 15:40:29     INFO -     SimpleTest.ok@SimpleTest/SimpleTest.js:417:16
[task 2021-03-12T15:40:29.332Z] 15:40:29     INFO -     reportError@SimpleTest/TestRunner.js:147:24
[task 2021-03-12T15:40:29.332Z] 15:40:29     INFO -     TestRunner._checkForHangs@SimpleTest/TestRunner.js:170:18
[task 2021-03-12T15:40:30.059Z] 15:40:30    ERROR - TEST-UNEXPECTED-FAIL | SimpleTest | this test already called finish!
[task 2021-03-12T15:40:30.095Z] 15:40:30     INFO - TEST-UNEXPECTED-ERROR | dom/svg/test/test_SVGLengthList.xhtml | called finish() multiple times

Comment 1

[Emilio Cobos Álvarez (:emilio)]

TSAN is pretty slow, I could believe Fission makes it even slower.

Comment 2

[Chris Peterson [:cpeterson]]

Resolving as WORKSFORME because I re-triggered the Fission TSan tests 5 times on try and didn't see any failures:

https://treeherder.mozilla.org/jobs?repo=try&revision=e151fb36d68f03b17cce5fc56a70c7648f338bb6