[perl #60780] Trouble when iteration variables don't add up

[Will Coleda via RT]

On Mon Apr 05 14:21:29 2010, coke wrote:
> On Sun Jan 11 00:21:58 2009, pmichaud wrote:
> > On Mon Nov 24 09:12:36 2008, masak wrote:
> > > <masak> rakudo: for 1..5 -> $a, $b { say $a, $b }
> > > <p6eval> rakudo 33137: OUTPUT[12␤34␤StopIteration␤current instr.:
> > > '_block11' pc 78 (EVAL_15:29)␤]
> > > 
> > > I haven't searched the specs or the tests for what should happen, 
> but
> > > I'm pretty sure this shouldn't throw an exception.
> > 
> > Stalling this ticket until there's a description of what should happen
> > (either in S04 or S07) and tests to match.
> > 
> > Thanks!
> > 
> > Pm
> > 
> > 
> 
> 17:17 < CokeBot9000> TimToady:
>                      http://rt.perl.org/rt3/Ticket/Display.html?id=60780 
> - I
>                      would imagine that on the last loop through, a 
> would get
>                      5, and b would get whatever undef is these days.
> 17:18 <@TimToady> no, it just fails to bind, unless you declare the 
> second
>                   parameter as optional
> 17:19 < CokeBot9000> (fails to bind) - just on the last iteration, yes?
> 17:20 <@TimToady> yes, just the last iteration
> 

23:56 < [Coke]> rakudo: for 1..5 -> $a, $b { say $a, $b }
23:56 <+p6eval> rakudo cbdd9b: OUTPUT«12␤34␤Not enough positional parameters 
passed; 
                got 1 but expected 2␤  in block <anon> at /tmp/DxYdxC7jfN:1␤  
in 
                method reify at src/gen/CORE.setting:3690␤  in method reify at 
                src/gen/CORE.setting:3595␤  in method reify at 
                src/gen/CORE.setting:3595␤  in method gimme…


23:56 < [Coke]> rakudo: for 1..5 -> $a, $b? { say $a, $b }
23:56 <+p6eval> rakudo cbdd9b: OUTPUT«12␤34␤5Mu()␤»

good enough for tests?

-- 
Will "Coke" Coleda