723168 - Crash [@ hb_ot_shape_execute_internal ] on Linux with Azure enabled

Status: RESOLVED DUPLICATE of bug 723110

(Core :: Graphics, defect)

Description

[Daniel C]

Mozilla/5.0 (X11; Linux x86_64; rv:13.0a1) Gecko/20120201 Firefox/13.0a1

Excited by bug 561361 comment 7, I went to try it out myself. Unfortunately, all I got was a crash :-(

This was with a new profile and gfx.azure.enabled = true.

Loading https://github.com/mojombo/ernie/network crashes almost immediately. I also see in the terminal:

--- no context for glyph 2f
--- no context for glyph 52
--- no context for glyph 44
--- no context for glyph 47
--- no context for glyph 4c
--- no context for glyph 51
--- no context for glyph 4a
--- no context for glyph 3
--- no context for glyph 55
--- no context for glyph 53
--- no context for glyph 4b
--- no context for glyph 57

So HarfBuzz seems to be having some trouble. Interestingly I haven't found another page that crashes yet, not even wikipedia.org which is typically font intensive because of all the different languages on the homepage.

First crash (also had layers.acceleration.force-enabled = true):

bp-72326c88-c574-4fbb-ae67-558a42120201

and without layers.acceleration.force-enabled (to rule it out):

bp-b260e484-3c22-47e0-a1cd-3a36a2120201

Graphics

Adapter Description: NVIDIA Corporation -- GeForce GT 520/PCI/SSE2
Vendor ID: NVIDIA Corporation
Device ID: GeForce GT 520/PCI/SSE2
Driver Version: 4.1.0 NVIDIA 280.13
WebGL Renderer: NVIDIA Corporation -- GeForce GT 520/PCI/SSE2 -- 4.1.0 NVIDIA 280.13
GPU Accelerated Windows: 0
AzureBackend: skia

Let me know if there's anything I can do to help test this.

Comment 1

[Marco Castelluccio [:marco]]

Skia is only used for canvas elements for now, so it can crash only when in the page there's a canvas (this is why on Wikipedia it doesn't crash).
However, this bug should be strictly related to bug 723110, I don't know if it's a dupe.

Comment 2

[Constantine]

The site from description crashes for me too. In addition to this I found some sites with the same problem (as I suppose):
http://canvasrider.com/tracks/random
http://ie.microsoft.com/testdrive/Performance/FishBowl
http://ie.microsoft.com/testdrive/Performance/Paintball/Default.html
http://www.sinuousgame.com
http://29a.ch/sandbox/2010/box2d2/test.html
http://www.kevs3d.co.uk/dev/asteroids
I think it may be helpful in testing and searching the cause of the problem.

Comment 3

[Marco Castelluccio [:marco]]

Thank you for your testing, I think the cause of the crashes is a problem in the font handling.
Could you try compiling a custom build with the patch in bug 723110 and see if the crashes are still there with that build?

Comment 4

[Constantine]

Yes, I've compiled firefox with this patch and every webpage from the list I posted above runs without any crashes.