I replaced the implementation with one based on properties. �It&#39;s in Squeak trunk and works fine. �The VisualWorks style clean-block implementation is more complex but arguably not better, and being based on become: is less well suited to Squeak.<div class="gmail_extra">
<br><br><div class="gmail_quote">On Sat, Nov 17, 2012 at 4:07 AM, Marcus Denker <span dir="ltr">&lt;<a href="mailto:marcus.denker@inria.fr" target="_blank">marcus.denker@inria.fr</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div class="im"><br>
On Nov 17, 2012, at 9:05 AM, Marcus Denker &lt;<a href="mailto:marcus.denker@inria.fr">marcus.denker@inria.fr</a>&gt; wrote:<br>
<br>
&gt;<br>
&gt; On Nov 17, 2012, at 8:20 AM, Mariano Martinez Peck &lt;<a href="mailto:marianopeck@gmail.com">marianopeck@gmail.com</a>&gt; wrote:<br>
&gt;<br>
&gt;&gt; Because it is not present in 2.0 but I couldn&#39;t find any issue about that.<br>
&gt;&gt;<br>
<br>
</div>Issue was <a href="http://code.google.com/p/pharo/issues/detail?id=6708" target="_blank">http://code.google.com/p/pharo/issues/detail?id=6708</a><br>
<div class="HOEnZb"><div class="h5"><br>
--<br>
Marcus Denker -- <a href="http://marcusdenker.de" target="_blank">http://marcusdenker.de</a><br>
<br>
<br>
</div></div></blockquote></div><br><br clear="all"><div><br></div>-- <br>best,<div>Eliot</div><br>
</div>