1502050 - Tab Crash after transferring an ArrayBuffer to a worker when its debugger page is open

Status: RESOLVED WORKSFORME

(Core :: DOM: Workers, defect, P3)

Description

[Kaiido]

Attachment: worker_debug.html

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:64.0) Gecko/20100101 Firefox/64.0

Steps to reproduce:

When opening a Worker's debugger from dev-tools:debugger-panel:Workers the tab crashes if we did transfer an ArrayBuffer to the Worker, and if it was initialised from a BlobURI.


Actual results:

Tab crash (all tabs refresh)

https://crash-stats.mozilla.com/report/index/b98e75b5-f380-4f1c-9f6e-16c200181025#tab-details


Expected results:

Should have been able to debug my worker.

It looks very similar to https://bugzilla.mozilla.org/show_bug.cgi?id=1319049  but for Files, it works fine.

Comment 1

[Marcia Knous [:marcia]]

Spotted a few of these crashes in the latest nightly - 5 crashes/2 installs in the last 7 days.

Comment 2

[Kaiido]

FWIW, I ran a bisect over this, and the results point out that it's not new (2017-10).
I wasn't able to go deeper than bisecting nightlies, so here is what got output:

Last good revision: 5eba13f5b3a6ad80decdd8c7b30bff5fa477844f (2017-10-08)
First bad revision: 2ed5e7fbf39e949693d8a7455d6313b14a7aeaf6 (2017-10-09)
Pushlog:
https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=5eba13f5b3a6ad80decdd8c7b30bff5fa477844f&tochange=2ed5e7fbf39e949693d8a7455d6313b14a7aeaf6

And in this Pushlog, a lot of commits, and a few that could match...

Comment 3

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

Closing because no crashes reported for 12 weeks.