bug#19484: segfault: 'disk-set' on empty disk

$ dd if=/dev/zero of=zero bs=1K count=1
1+0 records in
1+0 records out
1024 bytes (1.0 kB) copied, 0.000146148 s, 7.0 MB/s

$ parted zero disk_set
WARNING: You are not superuser.  Watch out for permissions.
Error: /home/user1/zero: unrecognised disk label


You found a bug in GNU Parted! Here's what you have to do:
[...]
Also include any additional information about your setup you
consider important.
                                                                         
Command History:
Segmentation fault (core dumped)

$ parted --version | head -1
parted (GNU parted) 3.2

$ uname -a
Linux host1 3.17.6-1-ARCH #1 SMP PREEMPT Sun Dec 7 23:43:32 UTC 2014
x86_64 GNU/Linux

$ valgrind parted zero disk_set |& head -20
==14358== Memcheck, a memory error detector
[...]
Error: /home/user1/zero: unrecognised disk label
==14358== Invalid read of size 8
==14358==    at 0x4E458D0: ped_disk_is_flag_available (in
/usr/lib/libparted.so.2.0.1)
==14358==    by 0x40B676: command_line_get_disk_flag (in /usr/bin/parted)
==14358==    by 0x40674B: ??? (in /usr/bin/parted)
==14358==    by 0x40C8B1: non_interactive_mode (in /usr/bin/parted)
==14358==    by 0x405F47: main (in /usr/bin/parted)
==14358==  Address 0x8 is not stack'd, malloc'd or (recently) free'd
==14358==