From @zoffixznet

If you enter the Quote braid, then define a new op, and then try to use it in a block within quotes, it fails to find the routine​:

18​:29 m​: ""; sub postfix​:<!>($) {}; "{ 5! }";
18​:29 camelia rakudo-moar e13512​: OUTPUT​: «5===SORRY!5=== Error while compiling <tmp>␤Negation metaoperator not followed by valid infix␤at <tmp>​:1␤------> 3""; sub postfix​:<!>($) {}; "{ 5!7⏏5 }";␤ expecting any of​:␤ infix␤ infix stopper␤»

But if you move the first quotes past the sub, then it works​:

18​:29 Zoffix m​: sub postfix​:<!>($) {}; ""; "{ 5! }";
18​:29 camelia rakudo-moar e13512​: OUTPUT​: «WARNINGS for <tmp>​:␤Useless use of constant string "" in sink context (line 1)␤Use of Nil in string context␤ in block <unit> at <tmp> line 1␤»

IRC​: https://irclog.perlgeek.de/perl6/2017-10-10#i_15284813

From @AlexDaniel

This is actually a regression.

Code​:
$ = ""; sub postfix​:<♥> { $^a + 42}; say "{ 5♥ }"

¦«2015.12»​:
47

¦«2016.06»​:
47

¦«2016.12»​:
47

¦«2017.06»​:
===SORRY!=== Error while compiling /home/bisectable/git/whateverable/data/regressionable/15285677/snippet
Bogus postfix
at /home/bisectable/git/whateverable/data/regressionable/15285677/snippet​:1
------> "; sub postfix​:<♥> { $^a + 42}; say "{ 5⏏♥ }"
    expecting any of​:
        infix
        infix stopper
        statement end
        statement modifier
        statement modifier loop «exit code = 1»

¦«HEAD»​:
===SORRY!=== Error while compiling /home/bisectable/git/whateverable/data/regressionable/15285677/snippet
Bogus postfix
at /home/bisectable/git/whateverable/data/regressionable/15285677/snippet​:1
------> "; sub postfix​:<♥> { $^a + 42}; say "{ 5⏏♥ }"
    expecting any of​:
        infix
        infix stopper
        statement end
        statement modifier
        statement modifier loop «exit code = 1»

Possible IRC discussion​: https://irclog.perlgeek.de/perl6-dev/2017-10-10#i_15285677

Bisectable points at 25 possible candidates​: https://gist.github.com/Whateverable/1510af516a727e3d09d1e19b39123f0e

There's some stuff about braids in these commits so maybe some inspiration can be taken from there.

On 2017-10-10 11​:30​:50, cpan@​zoffix.com wrote​:

If you enter the Quote braid, then define a new op, and then try to
use it in a block within quotes, it fails to find the routine​:

18​:29 m​: ""; sub postfix​:<!>($) {}; "{ 5! }";
18​:29 camelia rakudo-moar e13512​: OUTPUT​: «5===SORRY!5===
Error while compiling <tmp>␤Negation metaoperator not followed by
valid infix␤at <tmp>​:1␤------> 3""; sub postfix​:<!>($) {}; "{ 5!7⏏5
}";␤ expecting any of​:␤ infix␤ infix stopper␤»

But if you move the first quotes past the sub, then it works​:

18​:29 Zoffix m​: sub postfix​:<!>($) {}; ""; "{ 5! }";
18​:29 camelia rakudo-moar e13512​: OUTPUT​: «WARNINGS for
<tmp>​:␤Useless use of constant string "" in sink context (line 1)␤Use
of Nil in string context␤ in block <unit> at <tmp> line 1␤»

IRC​: https://irclog.perlgeek.de/perl6/2017-10-10#i_15284813

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

From @zoffixznet

Yeah, it's the quote lang cache that's giving trouble. I know where the bug is at just need to find the right swatter... Gonna do it next weekend.

From @zoffixznet

On Mon, 16 Oct 2017 15​:58​:01 -0700, cpan@​zoffix.com wrote​:

Yeah, it's the quote lang cache that's giving trouble. I know where
the bug is at just need to find the right swatter... Gonna do it next
weekend.

Thank you for the report. This is now fixed.

Fix​: rakudo/rakudo@ad16c6fb8635e08
Test​: Raku/roast@730b5c8239a8bb926

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