Comment 2 for bug 1212365

StacktraceTop:
 __libc_message (do_abort=2, fmt=0x7fb05a6bc028 "*** glibc detected *** %s: %s: 0x%s ***\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:201
 malloc_printerr (action=3, str=0x7fb05a6bc218 "double free or corruption (fasttop)", ptr=<optimized out>) at malloc.c:5018
 ntop_safefree (ptr=ptr@entry=0x7fb05252fc48, file=file@entry=0x7fb05ab99aba "ip.c", line=line@entry=113) at leaks.c:182
 deleteFragment (fragment=<optimized out>, actualDeviceId=actualDeviceId@entry=0) at ip.c:113
 purgeOldFragmentEntries (actualDeviceId=0) at ip.c:265