Since the tc-play package was updated on ArchLinux it's not possible to open a container,
the process hangs forever after:
tcplay -m container -d /dev/loop0 -k key
The password should be asked for but it never comes this far.

Using the former package, from before the updates works fine.

Bug-report on Arch:
https://bugs.archlinux.org/task/65678?project=5&order=dateopened&sort=desc

If you need more info let me know
Thanks for looking into it;)