Comment 0 for bug 1394871

I'm using Ubuntu 15.04 dev with secure-delete 3.1-6ubuntu1 and on wiping the empty space of an USB flash drive with FAT32 as filesystem I'm always getting this error after several hours:

root@ubuntu:~# sfill -fllv /media/sdf1
Wipe mode is insecure (one pass [random])
Wiping now ...
Creating /media/sdf1/oooooooo.ooo ... * Wiping inodes ...sfill: malloc.c:2372: sysmalloc: Assertion `(old_top == (((mbinptr) (((char *) &((av)->bins[((1) - 1) * 2])) - __builtin_offsetof (struct malloc_chunk, fd)))) && old_size == 0) || ((unsigned long) (old_size) >= (unsigned long)((((__builtin_offsetof (struct malloc_chunk, fd_nextsize))+((2 *(sizeof(size_t))) - 1)) & ~((2 *(sizeof(size_t))) - 1))) && ((old_top)->size & 0x1) && ((unsigned long) old_end & pagemask) == 0)' failed.
Aborted