Comment 2 for bug 1196189

StacktraceTop:
 __libc_message (do_abort=do_abort@entry=2, fmt=fmt@entry=0x7f2de9417860 "*** Error in `%s': %s: 0x%s ***\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:199
 malloc_printerr (ptr=0x73e6da0, str=0x7f2de9413852 "invalid fastbin entry (free)", action=3) at malloc.c:4902
 _int_free (av=<optimized out>, p=0x73e6d90, have_lock=0) at malloc.c:3758
 sigc::internal::signal_emit1<void, double const&, sigc::nil>::emit(sigc::internal::signal_impl*, double const&) () from /tmp/apport_sandbox_5vp92d/usr/lib/compiz/libunityshell.so
 nux::animation::AnimateValue<double>::Advance(int) () from /tmp/apport_sandbox_5vp92d/usr/lib/compiz/libunityshell.so