CGAL users discussion list

[Sylvain Pion <>]

Gmain wrote:
> Hi,
>
> I may have a bug in the middle of the programm (after ~200 calls)
>
> I am using your function supporting_plane()
> Kernel::Triangle_3 T1;
> Kernel::Plane_3 t1=T1.supporting_plane();
> Kernel::Plane_3 t2=T1.supporting_plane();
> The second time I get a malloc(): memory corruption
>
> Also when using it the following way:
> Kernel::Triangle_3 T1;
> Kernel::Triangle_3 T2;
> Kernel::Plane_3 t1=T1.supporting_plane();
> Kernel::Plane_3 t2=T2.supporting_plane();
> The second time I get a malloc(): memory corruption
>
> My project is running on lenny 64-bit, I´m using gcc 4.3
>
> By stepping through the function supporting_plane() step over fails and step
> into works - but only till we left the function
>
> the program output is:
>
> *** glibc detected ***
> /ECS/home/franki/NetBeansProjects/test_01/dist/Debug/GNU-Linux-x86/test_01:
> malloc(): memory corruption (fast): 0x0000000000af1fb8 ***
> ======= Backtrace: =========
> /lib/libc.so.6[0x7ffcb20bf948]
> /lib/libc.so.6[0x7ffcb20c267f]
> /lib/libc.so.6(__libc_malloc+0x98)[0x7ffcb20c3a78]
> /usr/lib/libstdc++.so.6(_Znwm+0x1d)[0x7ffcb28ffb9d]

Some questions :

Which kernel are you using ?

What happens if you initialize the triangles with some values
instead of just default constructing them ?

Can you send a small, stand-alone, complete, program reproducing it ?

--
Sylvain Pion
INRIA Sophia-Antipolis
Geometrica Project-Team
CGAL, http://cgal.org/