trying to name a partition on a device with no partition table crashes

[Michael Hudson-Doyle]

$ rm /tmp/blob; truncate -s 1G /tmp/blob; parted /tmp/blob name 1 name
WARNING: You are not superuser. Watch out for permissions.
Error: /tmp/blob: unrecognised disk label
Backtrace has 8 calls on stack:
  8: /lib/x86_64-linux-gnu/libparted.so.2(ped_assert+0x45) [0x7fad9a9d56e5]
  7: /lib/x86_64-linux-gnu/libparted.so.2(+0xff01) [0x7fad9a9d9f01]
  6: parted(command_line_get_partition+0x49) [0x55deb6909099]
  5: parted(+0x7fa6) [0x55deb6904fa6]
  4: parted(non_interactive_mode+0xa2) [0x55deb690a532]
  3: parted(main+0x121e) [0x55deb69032be]
  2: /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7) [0x7fad9a187b97]
  1: parted(_start+0x2a) [0x55deb690348a]

You found a bug in GNU Parted! Here's what you have to do:

Don't panic! The bug has most likely not affected any of your data.
Help us to fix this bug by doing the following:

Check whether the bug has already been fixed by checking
the last version of GNU Parted that you can find at:

 http://ftp.gnu.org/gnu/parted/

Please check this version prior to bug reporting.

If this has not been fixed yet or if you don't know how to check,
please visit the GNU Parted website:

 http://www.gnu.org/software/parted

for further information.

Your report should contain the version of this release (3.2)
along with the error message below, the output of

 parted DEVICE unit co print unit s print

and the following history of commands you entered.
Also include any additional information about your setup you
consider important.

Assertion (disk != NULL) at ../../libparted/disk.c:1598 in function ped_disk_get_partition() failed.

Aborted (core dumped)