1855302 - Intermittent failures in 1662259.html following enabling lint on the reftest harness

Status: RESOLVED FIXED

(Testing :: Reftest, defect)

Description

[Mark Banner (:standard8)]

Following enabling of linting on the reftest harness files (bug 1854906), there have been intermittent failures seen in layout/printing/crashtests/1662259.html.

In the logs, there are lots of errors like:

INFO - JavaScript error: resource://reftest/reftest-content.js, line 999: TypeError: can't access property "MutationObserver", contentRootElement.ownerGlobal is null

It appears that we're hitting that line intermittently. In bug 1854906, I changed the line according to the mozilla/use-ownerGlobal rule.

We already know that rule can't be used in all situations, and it was probably wrong to use it here. Reverting the change seems to fix the intermittent failures.

Hence, I'll revert the change and disable the rule for that line.

Comment 1

[Mark Banner (:standard8)]

Attachment: Bug 1855302 - Revert incorrect change to reftest-content which was causing intermittent failures. r?tnikkel!

Comment 2

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

Set release status flags based on info from the regressing bug 1854906

Comment 3

[Timothy Nikkel (:tnikkel)]

Wow, good work! Oh, I see bug 1840805 is how this came about. I wonder if there are any other new intermittents from this. Might be good to search a complete reftest and crashtest run for any new instances of javascript errors in the reftest harness. I can do that if you prefer.

Comment 4

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/c42df8559f05
Revert incorrect change to reftest-content which was causing intermittent failures. r=tnikkel

Comment 5

[Cosmin Sabou [:CosminS]]

https://hg.mozilla.org/mozilla-central/rev/c42df8559f05

Comment 7

[Intermittent Failures Robot]

1 failures in 3726 pushes (0.0 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-central: 1

Platform and build breakdown:

• windows11-64-2009-ccov-qr: 1
  • opt: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1855302&startday=2023-09-25&endday=2023-10-01&tree=all