[Gimp-user] 'critical error' running luminosity mask script

[Casey Connor <gimp-user-list caseyconnor org>]

Hi -- I just filed a bug (here 
<https://bugzilla.gnome.org/show_bug.cgi?id=795418>) for a 'critical 
error' that happens for me with 2.10 RC1 (AppImage from here 
<https://github.com/aferrero2707/gimp-appimage/releases/tag/continuous>).

I thought I'd write here in case anyone had any ideas for workarounds 
that I might try until the bug gets fixed. E.g. maybe there is something 
obviously deprecated that the script is doing? (I didn't write the 
script, but I modified it slightly.) It worked fine with 2.9.5. The 
script is attached at the bug report.

Thanks for any ideas!

-Casey