Possible regression in bashlib in 2.10.0

[kba]

(via email)

I have a problem with docker ocrd-all/maximum image, yesterday I installed it and ocrd-fileformat-transform yesterday worked well, today when I updated image I got new version from 2.7.1 which was ok to Version "0.0.1", ocrd/core "2.10.0" which does not work.

Error I get:
/usr/local/bin/ocrd-fileformat-transform: line 87: script_args: unbound variable

[kba]

It's indeed a regression, the ocrd__raise method got lost in #472. We should also require input/output file group to be provided explicitly.