[Gc] Re: Fwd: GC_free crash when used with FreeImage library

[Ivan Maidanski]

Hi Eduard,

Sorry for the delay. I have no time to reproduce the sample. But it looks when you call GC_free that memory is already freed.
May be someone else on the list has an idea what's wrong.

Regards,
Ivan

Sun, 15 Jul 2012 19:32:40 +0200 Eduard Urbach <e.urbach at gmail.com>:
> Hi Ivan,
> 
> I'm copying this message to you because somehow my mailing list membership
> is gone.
> Maybe you have a quick idea how to solve the problem.
> 
> Regards,
> Eduard
> 
> ---------- Forwarded message ----------
> From: Eduard Urbach <e.urbach at gmail.com>
> Date: Wed, Jul 11, 2012 at 11:47 AM
> Subject: GC_free crash when used with FreeImage library
> To: Boehm GC <gc at linux.hpl.hp.com>
> 
> 
> Hello everyone,
> 
> I'm not sure if I'm doing something wrong: I have a fairly normal
> installation of bdwgc 7.3 and FreeImage 3.15.3 which is only used in this
> part of my code:
> https://gist.github.com/3089309
> 
> When executing FreeImage_Unload() the application segfaults at
> 
>   Program received signal SIGSEGV, Segmentation fault.
> 
>   GC_free (p=0x83e92d8) at malloc.c:495
> 
>   sz = hhdr -> hb_sz;
> 
> 
> Even if I don't call FreeImage_Unload() the app crashes at the end.
> 
> If you want to reproduce it, install https://github.com/blitzprog/flua and
> execute the Graphics examples. They all segfault at termination.
> 
> 
> I tried disabling the GC with GC_disable() for that part of the code but
> that shows no effect.
> 
> I'm a bit confused right now, hope you can help me find the error source or
> show me whether I did a trivial mistake..
> 
> 
> Regards,
> 
> Eduard Urbach
> 
>