File validity check failing due to grep

[Joshuad2uiuc]

OSX no longer supports -P so the grep command fails.

[lschwetlick]

I also encountered this. As a quick fix this worked:

https://stackoverflow.com/a/22704387

[CTXz]

The grep regex should no longer rely on perl syntax as of commit ea17b03 and should hence also work for OSX users.

As there's currently no OSX machine available to me, I cannot confirm whether the commit fixed compatibility with OSX devices. Should the issue persist or should another issue arise, feel free to re-open the issue.