WebGL crash in iceweasel 32.0

[Mike Hommey]

On Wed, Jun 18, 2014 at 11:29:08PM +1000, Tim Allen wrote:
> I updated to the latest Aurora iceweasel, as per usual, and before
> I restarted, I happened to have a page open that used WebGL. After the
> restart, the browser loaded as normal and then disappeared.
> 
> After a little bit of investigation, I came up with the following
> reproduction steps:
> 
> - rm -rf /tmp/temp-profile; mkdir /tmp/temp-profile
> - iceweasel -profile /tmp/temp-profile -no-remote http://get.webgl.com
> 
> Expected results:
> 
> - Spinning cube rendered in WebGL
> 
> Actual results:
> 
> - Iceweasel prints the following messages (possibly unrelated):
> 
>   ATTENTION: default value of option force_s3tc_enable overridden by
>       environment.
>   Can't find symbol 'glXCreateContextAttribsARB'.
>   ATTENTION: option value of option force_s3tc_enable ignored.
>   ATTENTION: option value of option force_s3tc_enable ignored.
> 
> - Segfault
> 
> If I run the above steps in GDB, I can get the following backtrace:
> 
> #0  0x0000000000000000 in ?? ()
> #1  0x00007ffff449dd59 in TSymbolTableLevel::~TSymbolTableLevel (
>     this=0x7fffc4cac010, __in_chrg=<optimized out>)
>     at /tmp/buildd/iceweasel-32.0~a2+20140613004003/gfx/angle/src/compiler/SymbolTable.cpp:174

That's bug 751569.

Mike