[Bug 1003733] [NEW] Canvas does not work when built with gcc4.7

[Chris Coulson]

Public bug reported:

I noticed this earlier when running the peacekeeper tests, that the
canvas does not display any content on the build of Firefox we have in
quantal. This also happens at http://chrome.angrybirds.com/ (although,
there are occasional flickers of corruption on mouseover).

- This is broken on all builds I've tried with gcc4.7 (and is not dependant on PGO)
- It works when building the same version of Firefox with gcc4.6
- It is still broken even with accelerated layers disabled (layers.acceleration.disabled=true)
- It affects both 2d and webgl

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: firefox 13.0~b4+build1-0ubuntu4 [modified: usr/share/apport/package-hooks/source_firefox.py]
ProcVersionSignature: Ubuntu 3.4.0-3.7-generic 3.4.0
Uname: Linux 3.4.0-3-generic x86_64
AddonCompatCheckDisabled: False
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.25.
ApportVersion: 2.1-0ubuntu1
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  chr1s      5728 F.... pulseaudio
 /dev/snd/pcmC0D0p:   chr1s      5728 F...m pulseaudio
BuildID: 20120522181908
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf6960000 irq 44'
   Mixer name	: 'Intel IbexPeak HDMI'
   Components	: 'HDA:111d76d5,1028040a,00100104 HDA:80862804,80860101,00100000'
   Controls      : 32
   Simple ctrls  : 13
Channel: beta
Date: Thu May 24 01:42:00 2012
ForcedLayersAccel: False
IfupdownConfig:
 auto lo
 iface lo inet loopback
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64 (20110901)
IpRoute:
 default via 192.168.0.1 dev wlan0  proto static 
 169.254.0.0/16 dev wlan0  scope link  metric 1000 
 192.168.0.0/24 dev wlan0  proto kernel  scope link  src 192.168.0.3  metric 2 
 192.168.122.0/24 dev virbr0  proto kernel  scope link  src 192.168.122.1
MostRecentCrashID: bp-e0f08dbe-05e2-45a4-b1dc-7be982120206
Profiles: Profile0 (Default) - LastVersion=13.0/20120522181908 (In use)
RelatedPackageVersions:
 rhythmbox-mozilla 2.96-0ubuntu7
 totem-mozilla     3.0.1-0ubuntu22
 adobe-flashplugin 11.2.202.235-0precise1
 gnome-shell       3.4.1-0ubuntu2
 icedtea-6-plugin  1.2-2ubuntu1
RunningIncompatibleAddons: False
SourcePackage: firefox
UpgradeStatus: Upgraded to quantal on 2011-11-16 (189 days ago)
dmi.bios.date: 02/15/2011
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A07
dmi.board.name: 04373Y
dmi.board.vendor: Dell Inc.
dmi.board.version: A03
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA07:bd02/15/2011:svnDellInc.:pnLatitudeE6410:pvr0001:rvnDellInc.:rn04373Y:rvrA03:cvnDellInc.:ct9:cvr:
dmi.product.name: Latitude E6410
dmi.product.version: 0001
dmi.sys.vendor: Dell Inc.

** Affects: firefox (Ubuntu)
     Importance: Critical
         Status: Triaged

** Affects: firefox (Ubuntu Quantal)
     Importance: Critical
         Status: Triaged


** Tags: amd64 apport-bug beta-channel quantal running-unity

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https://bugs.launchpad.net/bugs/1003733

Title:
  Canvas does not work when built with gcc4.7

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