Comment 2 for bug 857738

StacktraceTop:
 __libc_message (do_abort=2, fmt=0x7f68ed11c0d8 "*** glibc detected *** %s: %s: 0x%s ***\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:189
 malloc_printerr (action=3, str=0x7f68ed11c278 "double free or corruption (!prev)", ptr=<optimized out>) at malloc.c:6283
 __GI___libc_free (mem=<optimized out>) at malloc.c:3738
 deallocate (__p=0x2164070, this=<optimized out>) at /usr/include/c++/4.6/ext/new_allocator.h:98
 _M_put_node (__p=0x2164070, this=<optimized out>) at /usr/include/c++/4.6/bits/stl_list.h:331