I have found myself doing quite a bit of mason at work lately, both maintaining old legacy stuff and as the view in a catalyst app.
While doing this I found myself missing the old ‘perl -c’ to quickly sanity check code, however naturally that won’t work on Mason - as mason is essentially HTML with inline perl, not the other way around. As such I wrote a quick script that emulates ‘perl -c’ by loading the file using mason inside eval then printing any errors. The script itself is pretty simple, though it doesn’t have any support for printing useful line numbers - but at least it gives an idea of what/where the problem is. The script also declares $c and $m, as at least for Catalyst - those will be available.