From @Juerd

  $ perl6 -e'say "hello".comb(/​:m <[o]>/)'
  ===SORRY!===
  chr codepoint cannot be negative

--
Met vriendelijke groet, // Kind regards, // Korajn salutojn,

Juerd Waalboer <juerd@​tnx.nl>
TNX

From @lizmat

On 09 Jan 2016, at 06​:03, Juerd Waalboer (via RT) <perl6-bugs-followup@​perl.org> wrote​:

# New Ticket Created by Juerd Waalboer
# Please include the string​: [perl #​127215]
# in the subject line of all future correspondence about this issue.
# <URL​: https://rt-archive.perl.org/perl6/Ticket/Display.html?id=127215 >

$ perl6 -e'say "hello".comb(/​:m <[o]>/)'
===SORRY!===
chr codepoint cannot be negative

Please, note more information is available with —ll-exception. For bug reporting / triage, this can be very helpful.

--
Met vriendelijke groet, // Kind regards, // Korajn salutojn,

Juerd Waalboer <juerd@​tnx.nl>
TNX

Seems to happen somewhere deep in the NQP regex bowels.

$ 6l '"hello".comb(/​:m <[o]>/)'
chr codepoint cannot be negative
  at <unknown>​:1 (<ephemeral file>​::73)
from gen/moar/stage2/QRegex.nqp​:1337 (/Users/liz/Github/rakudo.moar/install/share/nqp/lib/QRegex.moarvm​:!cursor_more​:97)
from gen/moar/m-CORE.setting​:10144 (/Users/liz/Github/rakudo.moar/install/share/perl6/runtime/./CORE.setting.moarvm​::69)
from gen/moar/m-CORE.setting​:12487 (/Users/liz/Github/rakudo.moar/install/share/perl6/runtime/./CORE.setting.moarvm​::25)
from gen/moar/m-CORE.setting​:12519 (/Users/liz/Github/rakudo.moar/install/share/perl6/runtime/./CORE.setting.moarvm​:push-exactly​:98)

I haven’t been able to golf this further yet.

Liz

The RT System itself - Status changed from 'new' to 'open'

From @coke

On Fri Jan 08 21​:03​:49 2016, juerd@​tnx.nl wrote​:

$ perl6 \-e'say "hello"\.comb\(/&#8203;:m \<\[o\]>/\)'
===SORRY\!===
chr codepoint cannot be negative

--
Will "Coke" Coleda

I can no longer duplicate this​:

$ perl6 --version
This is Rakudo version 2016.08.1 built on MoarVM version 2016.08
implementing Perl 6.c.
$ perl6 -e'say "hello".comb(/​:m <[o]>/)'
(o)

Closable with tests.

From @zoffixznet

Tests added in Raku/roast@92e0197c3a

@zoffixznet - Status changed from 'open' to 'resolved'