1155872 - APZ Crashing in platform_memmove

Status: RESOLVED WORKSFORME

(Core :: Panning and Zooming, defect)

Description

[Mason Chang [Inactive] [:mchang]]

While browsing with e10s on nightly, I'm getting lots of APZ crashes while scrolling. They look like this:

https://crash-stats.mozilla.com/report/index/ba09f98f-9e45-4740-a7f1-98b8a2150417

Comment 1

[Botond Ballo [:botond]]

Strange. It looks like the crash is coming from the copy constructor of FrameMetrics::mContentDescription when a copy of the FrameMetrics is made by NS_NewRunableMethodWithArg, but I'm not sure why it would be crashing.

Comment 2

[Kartikaya Gupta (email:[e-mail])]

Nothing jumps out at me either here. I noticed that there's pre-existing crashes with this signature on OS X though, so it's probably a pre-existing bug in the string code that's getting hit more often, or something. Maybe related to off-main-thread use of the string classes?

Comment 3

[vvdun18]

I confirm on e10s-Nightly on OS X 10.10.4: https://crash-stats.mozilla.com/report/index/dc2a70e5-e31d-4f39-ae96-093582150521

Comment 4

[Justin Dolske [:Dolske]]

FWIW, I hit this (bp-276523cb-bfc1-4bbc-a9f1-1f7a12150711) when printing a page on Twitter, in non-E10S mode with a current Nightly.

Comment 5

[Markus Stange [:mstange]]

(In reply to Justin Dolske [:Dolske] from comment #4)
> FWIW, I hit this (bp-276523cb-bfc1-4bbc-a9f1-1f7a12150711) when printing a
> page on Twitter, in non-E10S mode with a current Nightly.

This one looks unrelated to APZ, so I filed 1182732 about it.


I've been using APZ in my main browser for three days now and haven't hit this crash again, so I think it got fixed, or at least hidden. I was hitting it all the time a few weeks ago when I last tried APZ in my main profile.