E363: pattern uses more memory than 'maxmempattern'
I think there is a bug with highlighting. Error E363 happens when 35 or more dashes ('-') are in continuation. I use those in comments when I want to delimit sections of the document.
I don't know enough about syntax files, but I guess it should be an easy fix for someone who understands them.
I could not reproduce this. Is it still a problem?
Yep, I still have the issue. I have switched to neovim in the meantime (version 0.4.3).
Opening file test.puml with this contents results with E363: -----------------------------------
Thanks for letting me know about this one, I will see if I can fix it.