1665961 - Many permanent test failures 0x8000ffff (NS_ERROR_UNEXPECTED) [nsIPrefBranch.getBoolPref] - stack: experimentalFeatures/<@resource://gre/modules/Troubleshoot.jsm:433:26 when Gecko 82 merges to Beta on 2020-09-21

Status: RESOLVED FIXED

(Core :: JavaScript Engine: JIT, defect)

Description

[Sebastian Hengst [:aryx] (needinfo me if it's about an intermittent or backout)]

central-as-beta simulation: https://treeherder.mozilla.org/#/jobs?repo=try&group_state=expanded&resultStatus=testfailed%2Cbusted%2Cexception%2Cretry%2Cusercancel%2Crunnable&revision=a368f49e971a3f6ba2db9efc547e6bac3936b6ba&selectedTaskRun=Efp-oFSzRRyoXJu9k6sZ5Q.0

Failure log example: https://treeherder.mozilla.org/logviewer.html#?job_id=316085730&repo=try

Troubleshoot.jsm tries to read the preference of the experimental feature.

javascript.options.warp is only available in Nightly.

This needs either to be fixed or backed out, cut off for Nightly will be the merge late on Sunday European time.

Comment 1

[Jan de Mooij [:jandem]]

Sorry about that. I expect the pref to be available unconditionally next week.. Can we back this out? I can reland next week.

Leaving the needinfo for :jaws, he's on PTO but said we can probably change the getBoolPref to have a default of false. It's Friday night for me and I just want to unblock this.

Comment 2

[Sebastian Hengst [:aryx] (needinfo me if it's about an intermittent or backout)]

Fixed by backout of bug 1665415.