1545601 - Crash on OSX when unplugging USBC->HDMI/USB adapter to USB camera

Status: RESOLVED DUPLICATE of bug 1519535

(Core :: WebRTC: Audio/Video, defect, P2)

Description

[Logan Smyth [:loganfsmyth]]

I've gotten this a couple times over the last couple months. When I unplug my USBC -> HDMI+USB+Power adapter for my Macbook, Firefox has crashed. Looking at the crash report traces, it seems like the issue is that I have a USB webcam plugged into the USB port of that adapter, and Firefox is trying to query the camera device for information, which is failing.

I use https://appear.in daily so Firefox is often connecting to my Webcam, but this doesn't seem to happen very often, and it hasn't happened when I've actively been on a call. It just seems to happen randomly when I unplug my laptop to take it with me.

Here are the reports:

bp-3a2a3d9c-043d-43b8-8782-f86d30190418
bp-00f62241-0d06-4197-aa7d-8ad140190405
bp-e1dca492-b03e-4375-8494-80e300190226

Comment 1

[:Gijs (he/him)]

Seems the content process is asking the parent for camera device info, so we ask CoreFoundation, and it gets very upset with us for asking.

Comment 2

[Alex Chronopoulos [:achronop]]

Can you please try using Nightly to verify if it is fixed there or not. Right now it is reported as Release only. It's unlikely that a fix will be accepted in Release.

Comment 3

[Logan Smyth [:loganfsmyth]]

I generally haven't used Nightly because of the issues I've seen with people losing their open tabs.

Is there a specific change on Nightly that could have fixed this? This issue has only happened to me 3 times over the last 3 months, so I don't know that I'm willing to switch to Nightly fulltime for potentially months to see if the bug still happens. I don't consider the fix a huge priority so I don't care if Release is updated with a fix, I just want to make sure it is tracked and eventually fixed.

Comment 4

[Dan Minor [:dminor]]

There is a good chance that this is fixed by Bug 1519535, which is currently on Beta (landed in Firefox 67). Given the low frequency of the crashes, I don't think there is much point in you testing Beta to see if it is fixed.

Comment 5

[Dan Minor [:dminor]]

The crash stack looks identical, I think I'll actually dup it over to 1519535. Please file a new bug if you see problems once 67 hits release. (I meant to that with the last comment, but I accidentally hit save changes rather than resolve. Sorry about the extra noise).

Comment 6

[Logan Smyth [:loganfsmyth]]

Sounds good, thanks!