From @masak

<masak> rakudo​: say "foo" & "a nice old foo" ~~ /foo/
<p6eval> rakudo 95371a​: OUTPUT«This type cannot unbox to a native string [...]
<masak> b​: say "foo" & "a nice old foo" ~~ /foo/
<p6eval> b 1b7dd1​: OUTPUT«Bool​::True␤»
<masak> niecza​: say "foo" & "a nice old foo" ~~ /foo/
<p6eval> niecza v11-22-gbebf7a0​: OUTPUT«all(#<match from(0) to(3)
text(foo) pos([].list) named({}.hash)>, #<match from(11) to(14)
text(foo) pos([].list) named({}.hash)>)␤»
* masak submits rakudobug

I'm not sure why b's output boolifies there. I like Niecza's result
better. nom's error seems based on a misunderstanding -- the regexp
matcher shouldn't be seeing a junction, because the junctional value
should've autothreaded into individual strings at that point.

From @coke

On Mon Nov 07 07​:28​:26 2011, masak wrote​:

<masak> rakudo​: say "foo" & "a nice old foo" ~~ /foo/
<p6eval> rakudo 95371a​: OUTPUT«This type cannot unbox to a native
string [...]
<masak> b​: say "foo" & "a nice old foo" ~~ /foo/
<p6eval> b 1b7dd1​: OUTPUT«Bool​::True␤»
<masak> niecza​: say "foo" & "a nice old foo" ~~ /foo/
<p6eval> niecza v11-22-gbebf7a0​: OUTPUT«all(#<match from(0) to(3)
text(foo) pos([].list) named({}.hash)>, #<match from(11) to(14)
text(foo) pos([].list) named({}.hash)>)␤»
* masak submits rakudobug

I'm not sure why b's output boolifies there. I like Niecza's result
better. nom's error seems based on a misunderstanding -- the regexp
matcher shouldn't be seeing a junction, because the junctional value
should've autothreaded into individual strings at that point.

Behavior has changed, but not for the better​:

07​:32 < [Coke]> m​: say "foo" & "a nice old foo" ~~ /foo/
07​:32 < GLRelia> rakudo-moar ec355f​: OUTPUT«␤»
07​:32 <+camelia> rakudo-moar fd1612​: OUTPUT«｢all(Failure.new(exception => X​::OutOfRange.new(what => "Start argument to substr",
  got => "5", range => "0..3", comment => "use *5 if you want to index relative to the end"), backtrace =>
  Backtrace.new), "e o")｣␤»

Note that while nom fails, glr doesn't match.

--
Will "Coke" Coleda

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

From @FROGGS

Patch​: rakudo/rakudo@5d83db3d01
Tests​: Raku/roast@51d1a4835f

Closing ticket.

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