Re: Scan of regexps in emacs

[Paul Eggert]

Clément Pit-Claudel wrote:
> On 10/03/2019 22.45, Paul Eggert wrote:
> > -            (while (string-match (concat "\\(^" comint-prompt-regexp
> > +            (while (string-match (concat "\\(" comint-prompt-regexp
> >                                            "\\)\\1+")
> >                                    string)
> I think your change altered the meaning of that regexp.

Yes and no. Yes, it altered the meaning of the regexp, but no it should fix a 
bug rather than introduce one because comint-prompt-regexp in practice always 
seems to be anchored to a line start. For example, comint-prompt-regexp defaults 
to "^", which meant that the above code's entire regexp was this:

\(^^\)\1+

which is equivalent to this regexp:

\(^\^\)\1+

which is not what was wanted.