LayoutTest js/dom/imul.html is a flaky failure https://build.webkit.org/results/Apple%20El%20Capitan%20Release%20WK2%20(Tests)/r212130%20(13087)/results.html https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=js%2Fdom%2Fimul.html --- /Volumes/Data/slave/elcapitan-release-tests-wk2/build/layout-test-results/js/dom/imul-expected.txt +++ /Volumes/Data/slave/elcapitan-release-tests-wk2/build/layout-test-results/js/dom/imul-actual.txt @@ -44,7 +44,7 @@ PASS testIMul(2.5,-2.5,10000) is -40000 PASS testIMul(NaN, 1, 10000) is 0 PASS testIMul(Infinity, 1, 10000) is 0 -PASS testIMul(1e40, 1, 10000) is 0 +FAIL testIMul(1e40, 1, 10000) should be 0. Was 3108634624. PASS testIMul(1, NaN, 10000) is 0 PASS testIMul(1, Infinity, 10000) is 0 PASS testIMul(1, 1e40, 10000) is 0
First failure on the flakiness dashboard was 2/9/2017 12:00:10 PM @ r211973
There is no obviously related change (that I can see, at least).
Looks like this happened once or twice, and isn't happening any more. The latest failure so far was in r212169. Very suspicious that this affected multiple the bots at once, and quite concerning that it's just basic math that is failing. Filip, does this ring a bell? Could this be made more reproducible with any debug flags?
Checking other testers, I see failures on February 6th and on 14th. This is a very rare failure, but definitely a recent regression, as it hasn't been seen for at least 3 months before.
<rdar://problem/30529735>
The diff is always the same BTW, with 3108634624 (0xB94A0000) instead of 0.
Not happening any more on bots, the latest occurrence was on April 15th.
Resolved since mid-Apr as ap says.