/usr/lib/chromium-browser/chromium-browser:5:AsLocatedEvent:DispatchMouseEvent:DispatchEvent:non:DispatchEvent

[errors.ubuntu.com bug bridge]

The Ubuntu Error Tracker has been receiving reports about a problem regarding chromium-browser. This problem was most recently seen with package version 64.0.3282.140-0ubuntu0.17.10.1, the problem page at https://errors.ubuntu.com/problem/2ba87566e823966fa28f4720cc19be87bdb35b98 contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports.
If you do not have access to the Ubuntu Error Tracker and are a software developer, you can request it at http://forms.canonical.com/reports/.

[Olivier Tilloy (osomon)]

This appears to be upstream bug https://bugs.chromium.org/p/chromium/issues/detail?id=808741

[Walter (wdoekes)]

I've seen a crash with that exact backtrace on Artful just now.

Both on 64.0.3282.140-0ubuntu0.17.10.1 and on 64.0.3282.167-0ubuntu0.17.10.1.

For 140 I did not get a full backtrace because I could not locate the dbgsym at the time. For 167 the backtrace ends in AsLocatedEvent() <- DispatchMouseEvent() <- DispatchEvent() <- ...

Reproducing was as simple as:

- open a website where you can scroll
- set mouse scroll-wheel to keep scrolling (I have a button to disable friction)
- scroll
- right click on the webpage
- at that point, the context menu opens and the browser crashes

Many in the office can reproduce (also on Ubuntu 16.04), except for that one guy who uses Xorg (not Wayland) on 17.10.

Cheers,
Walter

P.S. Bug report filed as https://errors.ubuntu.com/oops/7446be7c-16f5-11e8-bbf2-fa163ebeb28a -- I think. I cannot view them myself.

[Olivier Tilloy (osomon)]

Thanks for the feedback Walter. I am unable to reproduce the crash in a wayland session with version 65.0.3325.73 from the beta PPA (https://launchpad.net/~chromium-team/+archive/ubuntu/beta/+packages). Would you be able to upgrade to that version and test whether the crash is fixed (that's what the upstream bug report seems to imply, and a confirmation would be very welcome)?

[Walter (wdoekes)]

Hi Olivier,

I'm sorry, I must've missed your reply. Apparently I did not auto-subscribe to the bug-updates.

It crashed again today with 64.0.3282.167-0ubuntu0.17.10.1, so I went here, saw your response and tried to reproduce: before upgrading it crashed as expected, but with the latest version from your link (65.0.3325.88-0ubuntu0.17.10.1) it did NOT crash.

So, that looks good :)

(One minor nit: my failed attempts at reproducing somehow broke the scrolling in this Tab. The vertical slider works, but the mouse wheel just stopped working, both for the entire window and for this textarea where I'm typing this. In other Tabs the scroll-wheel works fine. And attempting to reproduce this new bug in other Tabs failed thusfar.)

Cheers,
Walter

[Olivier Tilloy (osomon)]

Based on Walter's confirmation, and the fact that the last version affected in the error tracker is 64.0.3282.167-0ubuntu0.17.10.1, I'm marking this fixed.