Comment 2 for bug 1131738

StacktraceTop:
 __libc_message (do_abort=do_abort@entry=2, fmt=fmt@entry=0x7f551caa5860 "*** Error in `%s': %s: 0x%s ***\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:199
 malloc_printerr (action=3, str=0x7f551caa1808 "corrupted double-linked list", ptr=<optimized out>) at malloc.c:4902
 _int_free (av=0x7f5508000020, p=0x7f550801ac30, have_lock=0) at malloc.c:3903
 VBoxNsprPR_Free (ptr=ptr@entry=0x7f550801acf0) at /build/buildd/virtualbox-4.1.22-dfsg/src/libs/xpcom18a4/nsprpub/pr/src/malloc/prmem.c:507
 VBoxNsprPR_DestroyLock (lock=0x7f550801acf0) at /build/buildd/virtualbox-4.1.22-dfsg/src/libs/xpcom18a4/nsprpub/pr/src/pthreads/ptsynch.c:186