bug#22655: grep -Pz '^' now fails!

[Stephane Chazelas]

2016-11-18 07:54:29 -0800, Paul Eggert:
> Stephane Chazelas wrote:
> >Can that bug please be reopened so it can be addressed
> >differenly (PCRE_MULTILINE removed, PCRE_DOLLAR_ENDONLY added)?
> 
> Removing PCRE_MULTILINE will make 'grep' waaaay slower. Can you
> think of a way of fixing the bug that doesn't involve removing
> PCRE_MULTILINE?

Why would it make it slower. AFAICT, PCRE_MULTILINE *adds*
some overhead. It is really meant to be only about changing the
behaviour of ^ and $.

Not-PCRE_MULTILINE is the default about everywhere else
(including less, pcregrep, ssed -R).

Do you have any particular test-case in mind?

-- 
Stephane