bug#64351: probabe bug associated with “completion-regexp-list”

[Shynur Xie]

> Shynur> Evaluate this:
> Shynur>     (setq completion-regexp-list '("^[^-]"))
> Stefan> Bad idea.

I have to say that it is not a bad idea to write this _meaningless_
and _short_ expression.  I just want to find a short enough expression
to show the issue.  If I post a _long_ code snippet and say “Hey,
there’s a bug”, nobody wants to see it. :-)