Re: Calling Lisp from undo.c's record_* functions

[Eli Zaretskii]

> From: Stefan Monnier <address@hidden>
> Cc: address@hidden, address@hidden
> Date: Tue, 17 Nov 2015 14:09:36 -0500
> 
> prepare_to_modify_buffer runs before-change-functions, so it's been
> running Elisp code for many years.  Maybe there are still problems
> lurking, but I'm not too worried and they'd have to be fixed regardless
> of what we do with run_undoable_change.

I _am_ worried, and I think we should look into this now, and fix
anything that needs fixing.