From @LLFourn

<one two three>.map({$_}) ~~ set(<two three one>)

This Seq has already been iterated, and its values consumed (you might
solve this by addding .cache on usages of the Seq, or by assigning the Seq
into an array)

Although this might not be a bug per-se I don't think this is a nice thing
to do to users so this ticket is to suggest that Setty.ACCEPTS can be
implemented to stop this happening.

From @lizmat

On 05 Jan 2016, at 09​:05, Lloyd Fournier (via RT) <perl6-bugs-followup@​perl.org> wrote​:

# New Ticket Created by Lloyd Fournier
# Please include the string​: [perl #​127166]
# in the subject line of all future correspondence about this issue.
# <URL​: https://rt-archive.perl.org/perl6/Ticket/Display.html?id=127166 >

<one two three>.map({$_}) ~~ set(<two three one>)

This Seq has already been iterated, and its values consumed (you might
solve this by addding .cache on usages of the Seq, or by assigning the Seq
into an array)

Although this might not be a bug per-se I don't think this is a nice thing
to do to users so this ticket is to suggest that Setty.ACCEPTS can be
implemented to stop this happening.

Fixed with d1ff735 , tests added with b774bcc , can be closed

Liz

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

From @usev6

On Tue Jan 05 01​:11​:37 2016, elizabeth wrote​:
[...]

Fixed with d1ff735 , tests added with b774bcc , can be closed

Thanks! I'm closing this ticket as 'resolved'.

@usev6 - Status changed from 'open' to 'resolved'