Bug #123146 for Regexp-Debugger: Regexp::Debugger+PPR dies with "Eval-group not allowed at runtime"

Thu Sep 28 04:15:52 2017 haukex [...] zero-g.net - Ticket created

Subject:

Regexp::Debugger+PPR dies with "Eval-group not allowed at runtime"

Hi, $ perl -MPPR -MRegexp::Debugger -E '""=~m{\A(?&PerlDocument)\Z$PPR::GRAMMAR}x' Eval-group not allowed at runtime, use re 'eval' in regex m/(?#R_d:0)(?>\A(?{Regexp::Debugger::_reset_debugger_state()})(?!)|\G(?{Regexp::Debugger::_reset_debugger_state_rematch.../ at (eval 45) line 23034. This is a standard build Perl 5.26.0 on Linux with PPR 0.000013 and Regexp::Debugger 0.002001; also tested with Perl 5.22, same problem. Just to play it safe, I also copied down your first example from your talk "Three Little Words", unfortunately the same error. Regards, -- Hauke D

Thu Sep 28 08:02:28 2017 damian [...] conway.org - Correspondence added

Subject:	Re: [rt.cpan.org #123146] Regexp::Debugger+PPR dies with "Eval-group not allowed at runtime"
Date:	Thu, 28 Sep 2017 22:01:37 +1000
To:	bug-Regexp-Debugger [...] rt.cpan.org
From:	Damian Conway <damian [...] conway.org>

Thanks for the report. This issue is due to changes in the way Perl parses regexes. The change occurred between Perl 5.16 and 5.18. I have raised the issue with P5P but no solution has been offered. And I cannot find any workaround for the problem. Basically, this means that any regex that interpolates code blocks from a variable cannot be Regexp::Debugged after Perl 5.16. :-( Sorry, Damian

Thu Sep 28 08:02:29 2017 The RT System itself - Status changed from 'new' to 'open'

Fri Sep 29 04:15:48 2017 haukex [...] zero-g.net - Correspondence added

Subject:	Re: [rt.cpan.org #123146] Regexp::Debugger+PPR dies with "Eval-group not allowed at runtime"
Date:	Fri, 29 Sep 2017 10:07:03 +0200
To:	bug-Regexp-Debugger [...] rt.cpan.org
From:	Hauke D <haukex [...] zero-g.net>

Hi, Thanks for the information, that is too bad. Would it have something to do with this P5P thread? https://www.nntp.perl.org/group/perl.perl5.porters/2013/06/msg203770.html Regards, -- Hauke D On 28.09.2017 14:02, damian@conway.org via RT wrote: Show quoted text

> <URL: https://rt.cpan.org/Ticket/Display.html?id=123146 > > > Thanks for the report. > > This issue is due to changes in the way Perl parses regexes. > The change occurred between Perl 5.16 and 5.18. > I have raised the issue with P5P but no solution has been > offered. And I cannot find any workaround for the problem. > > Basically, this means that any regex that interpolates > code blocks from a variable cannot be Regexp::Debugged > after Perl 5.16. :-( > > Sorry, > > Damian > >

Fri Sep 29 21:16:36 2017 damian [...] conway.org - Correspondence added

Subject:	Re: [rt.cpan.org #123146] Regexp::Debugger+PPR dies with "Eval-group not allowed at runtime"
Date:	Sat, 30 Sep 2017 11:15:20 +1000
To:	bug-Regexp-Debugger [...] rt.cpan.org
From:	Damian Conway <damian [...] conway.org>

Show quoted text

> Would it have something to do with this P5P thread? > > https://www.nntp.perl.org/group/perl.perl5.porters/2013/06/msg203770.html

That was a separate problem, which has now been resolved. The deep changes to the regex engine in 5.18 and 5.20 caused multiple issues with modules that modify regexes as they're compiled (like Regexp::Grammars and Regexp::Debugger). Damian