From ekiru.0@gmail.com

Here's a relevant irclog​:

[8​:58pm] pmichaud​: rakudo​: my regex foo($s) { $s }; say 'a' ~~ / <&foo('a')> /
[8​:58pm] p6eval​: rakudo fcf4f3​: OUTPUT«===SORRY!===␤regex assertion
not terminated by angle bracket at line 22, near "('a')> /"␤»
[8​:58pm] pmichaud​: rakudo​: my regex foo($s) { $s }; say 'a' ~~ / <foo('a')> /
[8​:59pm] p6eval​: rakudo fcf4f3​: OUTPUT«Method 'foo' not found for
invocant of class 'Cursor'␤ in <anon> at line 22​:/tmp/1_T4OrYTpn␤ in
'Cool​::match' at line 2406​:CORE.setting␤ in 'Regex​::ACCEPTS' at line
5676​:CORE.setting␤ in main program body at line 22​:/tmp/1_T4OrYTpn␤»
[8​:59pm] pmichaud​: a-ha
[8​:59pm] pmichaud​: it doesn't know how to parse circumfixes on variables
[8​:59pm] pmichaud​: a-ha
[8​:59pm] pmichaud​: because STD.pm parses an entire expression there
[8​:59pm] pmichaud​: we might be able to handle that.
[9​:00pm] pmichaud​: please file rakudobug if you get a chance.

This also occurs with <&foo​: 'a'>.

For either "my regex foo($s) { $s }; say 'a' ~~ / <&foo('a')> /;" or
"my regex foo($s) { $s }; say 'a' ~~ / <&foo​: 'a'> /;", the output
should be 'a'.

--
Tyler Curtis

@coke - Status changed from 'new' to 'open'

From @ShimmerFairy

By sheer serendipity, these two bugs were rediscovered just today (see http://irclog.perlgeek.de/perl6/2014-03-13#i_8432837 and onwards). The <foo(arg)> form is fixed, while the <&foo(arg)> currently fails with this message​:

<lue> m​: my regex foo($s) { $s }; say 'a' ~~ / <&foo('a')> /
<camelia> rakudo-moar 20193f​: OUTPUT«===SORRY!=== Error while compiling /tmp/ovRhg7YJHv␤Unable to parse expression in metachar​:sym<assert>; couldn't find final '>' ␤at /tmp/ovRhg7YJHv​:1␤------> regex foo($s) { $s }; say 'a' ~~ / <&foo⏏('a')> /␤»

From @jnthn

On Thu Mar 13 19​:56​:42 2014, lue wrote​:

By sheer serendipity, these two bugs were rediscovered just today (see
http://irclog.perlgeek.de/perl6/2014-03-13#i_8432837 and onwards). The
<foo(arg)> form is fixed, while the <&foo(arg)> currently fails with
this message​:

<lue> m​: my regex foo($s) { $s }; say 'a' ~~ / <&foo('a')> /
<camelia> rakudo-moar 20193f​: OUTPUT«===SORRY!=== Error while
compiling /tmp/ovRhg7YJHv␤Unable to parse expression in
metachar​:sym<assert>; couldn't find final '>' ␤at
/tmp/ovRhg7YJHv​:1␤------> regex foo($s) { $s }; say 'a' ~~ /
<&foo⏏('a')> /␤»

This is now also fixed, along with the <&foo​: ...> form. Both have tests in S05-interpolation/lexicals.t.

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