1242128 - Frequent Win8 TEST-UNEXPECTED-PASS | /html/syntax/parsing/DOMContentLoaded-defer.html | The end: DOMContentLoaded and defer scripts - expected FAIL

Status: NEW

(Core :: DOM: Core & HTML, defect, P5)

Description

[Phil Ringnalda (:philor)]

Nearly 50% frequent in https://treeherder.mozilla.org/#/jobs?repo=mozilla-inbound&revision=08143e9bc182&selectedJob=20364146&filter-searchStr=ce0e605c9a0b972f5a2542ab448fdd65b5c7f44d (though this is only the worst of the platforms, more bugs on unexpected-fails to follow).

Comment 1

[James Graham [:jgraham]]

I don't understand why this test asserts that setTimeout tasks will fire before DOMContentLoaded. AFAICT from the spec that would only be the case if the tasksource for the DOMContentLoaded in https://html.spec.whatwg.org/#the-end were the same as the tasksource for the setTimeout, and the useragent took up the option of firing setTimeout(,0) tasks immediately. However the first is certainly not true and the second need not be true, so I think this test is broken. I think it's unsafe to use postMessage for the test for the same reason (different task source). However I think you can pick something else that uses the DOM Manipulation Task Source e.g. a runtime script error or inserting an iframe with no src.

Comment 2

[James Graham [:jgraham]]

I'll temporarily disable this since my first attempt at a proper fix was broken.

Comment 3

[Pulsebot]

https://hg.mozilla.org/integration/mozilla-inbound/rev/69eea7de3c44

Comment 4

[Phil Ringnalda (:philor)]

https://hg.mozilla.org/mozilla-central/rev/69eea7de3c44

Comment 5

[Intermittent Failures Robot]

9 automation job failures were associated with this bug in the last 7 days.

Repository breakdown:
* mozilla-inbound: 9

Platform breakdown:
* windows8-64: 9

For more details, see:
https://brasstacks.mozilla.com/orangefactor/?display=Bug&bugid=1242128&startday=2016-01-18&endday=2016-01-24&tree=all

Comment 6

[:Ms2ger (he/him; ⌚ UTC+1/+2)]

Filed an issue upstream: https://github.com/w3c/web-platform-tests/issues/4267

Comment 7

[BugBot [:suhaib / :marco/ :calixte]]

The leave-open keyword is there and there is no activity for 6 months.
:hsinyi, maybe it's time to close this bug?

Comment 8

[Hsin-Yi Tsai (she/her) | away [:hsinyi]]

This bug is still valid for re-enabling the test.