C-c during emu verify causes an IndexError

[ChrisCummins]

$ emu verify -S /mnt/primary
^Cemu: received SIGINT
Traceback (most recent call last):
  File "/usr/local/bin/emu-verify", line 63, in <module>
    ret = main(argv, len(argv))
  File "/usr/local/bin/emu-verify", line 52, in main
    use_cached=options.use_cached):
  File "/usr/local/libexec/emu/libemu.py", line 602, in verify
    clean = worker_thread.get() == self.id.checksum
  File "/usr/local/libexec/emu/libemu.py", line 2485, in get
    return stdout.split()[0][:32]
IndexError: list index out of range

$ emu version
emu version 0.1.50