Suddenly broken autocommands

[chdiza]

Steps to reproduce

Start vim and set &ft to mail. Observe:

Error detected while processing FileType Autocommands for "*"..Syntax Autocommands for
 "*"..Syntax Autocommands for "*"..function <SNR>4_SynSet[25]..script /pathtovimruntime/share/vim/vim91/syntax/mail.vim:
line   67:
E945: Range too large in character class
Press ENTER or type command to continue

Expected behaviour

I expect that not to happen. This just started after a fresh build, so the bad commit happened within the last couple of days. I'm at work and don't have time to bisect right now.

Version of Vim

9.1.50

Environment

Linux Mint 21.something

Logs and stack traces

No response

[chdiza]

Have to be away from machine for a while, but I've discovered that having se re=1 in my vimrc is a necessary condition of this happening.

[chrisbra]

Yeah, it comes from this commit: 36e2c0f I'll ping the maintainer to add \%#=2 at the beginning of that particular syntax match. (although I am not really sure, that the DFA regex engine can handle such a large range in a collection).

[chdiza]

OK, thanks. That is indeed the commit. I tested your suggested fix and it seems to work.

Separately, it's not clear to me why that commit messed with so many of the :hi colors. Is there a good reason for this?

[gi1242]

I'll send a pull request with the fix shortly. I changed the default groups because I (finally) moved to newer color schemes. Most of them seem to dim comments, so it made more sense to highlight signatures as comments instead of quoted texts.