From: Matthew Kerwin <matthew@...>
Date: 2013-08-08T17:42:26+10:00
Subject: [ruby-core:56451] Re: [ruby-trunk - Bug #8735][Open] Enumerator::Lazy#zip behaves differently from Enumerable#zip when yield with non-single argument

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I believe the issue is here:
https://github.com/ruby/ruby/blob/trunk/enumerator.c#L1703

I'd write a patch for the cases argc==0{Qnil} or argc>1{rb_ary_new4(...)}
but I'm away from my computer right now.

Sent from my phone, so excuse the typos.
On Aug 5, 2013 9:30 PM, "kachick (Kenichi Kamiya)" <kachick1@gmail.com>
wrote:

>
> Issue #8735 has been reported by kachick (Kenichi Kamiya).
>
> ----------------------------------------
> Bug #8735: Enumerator::Lazy#zip behaves differently from Enumerable#zip
> when yield with non-single argument
> https://bugs.ruby-lang.org/issues/8735
>
> Author: kachick (Kenichi Kamiya)
> Status: Open
> Priority: Normal
> Assignee:
> Category:
> Target version:
> ruby -v: ruby -v ruby 2.1.0dev (2013-08-05 trunk 42385) [i686-linux]
> Backport: 1.9.3: UNKNOWN, 2.0.0: UNKNOWN
>
>
> =begin
> Is this intended?
>
>
>  obj = Object.new
>  def obj.each
>    yield
>    yield 1, 2
>  end
>
>  obj.to_enum.zip(obj.to_enum)            #=> [[nil, nil],
>                                          #    [[1, 2], [1, 2]]]
>
>
>  obj.to_enum.lazy.zip(obj.to_enum).force #=> [[false, nil],
>                                          #    [1, [1, 2]]]
> =end
>
>
>
> --
> http://bugs.ruby-lang.org/
>
>

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<p>I believe the issue is here: <a href=3D"https://github.com/ruby/ruby/blo=
b/trunk/enumerator.c#L1703">https://github.com/ruby/ruby/blob/trunk/enumera=
tor.c#L1703</a></p>
<p>I&#39;d write a patch for the cases argc=3D=3D0{Qnil} or argc&gt;1{rb_ar=
y_new4(...)} but I&#39;m away from my computer right now.</p>
<p>Sent from my phone, so excuse the typos.</p>
<div class=3D"gmail_quote">On Aug 5, 2013 9:30 PM, &quot;kachick (Kenichi K=
amiya)&quot; &lt;<a href=3D"mailto:kachick1@gmail.com">kachick1@gmail.com</=
a>&gt; wrote:<br type=3D"attribution"><blockquote class=3D"gmail_quote" sty=
le=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
Issue #8735 has been reported by kachick (Kenichi Kamiya).<br>
<br>
----------------------------------------<br>
Bug #8735: Enumerator::Lazy#zip behaves differently from Enumerable#zip whe=
n yield with non-single argument<br>
<a href=3D"https://bugs.ruby-lang.org/issues/8735" target=3D"_blank">https:=
//bugs.ruby-lang.org/issues/8735</a><br>
<br>
Author: kachick (Kenichi Kamiya)<br>
Status: Open<br>
Priority: Normal<br>
Assignee:<br>
Category:<br>
Target version:<br>
ruby -v: ruby -v ruby 2.1.0dev (2013-08-05 trunk 42385) [i686-linux]<br>
Backport: 1.9.3: UNKNOWN, 2.0.0: UNKNOWN<br>
<br>
<br>
=3Dbegin<br>
Is this intended?<br>
<br>
<br>
=A0obj =3D Object.new<br>
=A0def obj.each<br>
=A0 =A0yield<br>
=A0 =A0yield 1, 2<br>
=A0end<br>
<br>
=A0obj.to_enum.zip(obj.to_enum) =A0 =A0 =A0 =A0 =A0 =A0#=3D&gt; [[nil, nil]=
,<br>
=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0=
 =A0 =A0# =A0 =A0[[1, 2], [1, 2]]]<br>
<br>
<br>
=A0obj.to_enum.lazy.zip(obj.to_enum).force #=3D&gt; [[false, nil],<br>
=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0=
 =A0 =A0# =A0 =A0[1, [1, 2]]]<br>
=3Dend<br>
<br>
<br>
<br>
--<br>
<a href=3D"http://bugs.ruby-lang.org/" target=3D"_blank">http://bugs.ruby-l=
ang.org/</a><br>
<br>
</blockquote></div>

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