973971 - Crashes in mozilla::gfx::DrawGradient() | mozilla::gfx::DrawTargetCG::FillRect() throwing a C++ exception

Status: VERIFIED FIXED

(Core :: Graphics, defect)

Description

[Steven Michaud [:smichaud] (Retired)]

This is spun off from bug 928168 and bug 973308.  It concerns the "new crashes" discussed at bug 928168 comment #58 and following.

These crashes were triggered by the following patch:

http://hg.mozilla.org/mozilla-central/rev/7d6e5cd7fe20

 Bug 966996 - The computed gradient stops need not cover the origin, so don't start at zero. r=jrmuizel
author	Markus Stange <[e-mail]>
	Thu Feb 13 12:11:16 2014 +0100 (at Thu Feb 13 12:11:16 2014 +0100)

Together they're now easily the #1 topcrasher on the 30 branch (currently the trunk).

The crash stacks for OS X 10.9.X and 10.8.X and largely corrupt and unreadable.  But the crash stacks for OS X 10.7.5 and 10.6.8 are clear enough:

https://crash-stats.mozilla.com/report/list?signature=libsystem_kernel.dylib%400x16ce2&product=Firefox&query_type=contains&range_unit=weeks&process_type=any&platform=mac&version=Firefox%3A30.0a1&hang_type=any&date=2014-02-18+17%3A00%3A00&range_value=1#reports

https://crash-stats.mozilla.com/report/list?signature=__kill&product=Firefox&query_type=contains&range_unit=weeks&process_type=any&platform=mac&version=Firefox%3A30.0a1&hang_type=any&date=2014-02-18+17%3A00%3A00&range_value=1#reports

I don't know why we crash throwing a C++ exception.  That may be a separate issue.

Comment 1

[Steven Michaud [:smichaud] (Retired)]

STR, taken from bug 928168 comment #70 and bug 928168 comment #71:

1) Visit https://mail.mozilla.com and log in.
2) Click on the Calendar tab.
3) Then click back and forth on the Day, Week and Month tabs.

Comment 4

[Lukas Blakk [:lsblakk] use ?needinfo]

We're certainly going hit a lot of this internally, and it might be impacting other sites, so worth tracking for now.

Comment 6

[Steven Michaud [:smichaud] (Retired)]

Markus's v1 patch at bug 973308 (attachment 8377087 [details] [diff] [review]) is actually targeted at this bug.  I'll try it and report back.

Comment 7

[Steven Michaud [:smichaud] (Retired)]

I tried your v1 patch, Markus, and with it I no longer crash using the STR from comment #1.

Comment 8

[Benjamin Kerensa [:bkerensa]]

I'm having this crash too with the same signature on Twitter, LinkedIn and a few other sites.

Comment 9

[Robert Kaiser]

(In reply to Benjamin Kerensa [:bkerensa] from comment #8)
> I'm having this crash too with the same signature on Twitter, LinkedIn and a
> few other sites.

Many people that use Macs do, and according to comment #7, the patch in bug 973308 helps. It should land ASAP.

Comment 11

[Markus Stange [:mstange]]

The crash should be fixed by bug 973308. Please reopen if it's not.

Comment 12

[Bogdan Maris, Desktop QA]

I was able to crash an old Nightly (2014-02-15) using STR from comment 1 on Mac OS X 10.7.5 bp-f721c722-9799-411c-baa0-95c162140506. Verified that the issue does not reproduce anymore using Firefox 30 beta 2 on Mac OS X 10.7, 10.6, 10.8 and 10.9. I used the zimbra demo page http://www.zimbra.com/products/hosted_demo.php