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<p>Perfect, thank you!</p>
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<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>Von:</b> Squeak-dev <squeak-dev-bounces@lists.squeakfoundation.org> im Auftrag von David T. Lewis <lewis@mail.msen.com><br>
<b>Gesendet:</b> Samstag, 15. Februar 2020 01:59:51<br>
<b>An:</b> The general-purpose Squeak developers list<br>
<b>Betreff:</b> Re: [squeak-dev] The Inbox: Kernel-ct.1297.mcz</font>
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<div class="PlainText">Hi Christoph,<br>
<br>
On Fri, Feb 14, 2020 at 02:40:05PM +0000, Thiede, Christoph wrote:<br>
> @David:<br>
> <br>
> <br>
> > Item was removed:<br>
> <br>
> > - ----- Method: ObjectTracer class>>initialize (in category 'initialize-release') -----<br>
> <br>
> > - initialize<br>
> > - "Fix for inconsistent image state in which ObjectTracer improperly appears as a subclass<br>
> > - of Class. This initialization should appear in the Squeak update stream in order to repair<br>
> > - existing images, and may be removed in a future update."<br>
> > -<br>
> > - Class removeSubclass: ObjectTracer class!<br>
> <br>
> <br>
> Is this ok?<br>
<br>
<br>
Thanks for checking. Yes, removing this #initialize method is ok.<br>
<br>
<br>
> Can you tell me why you did not use a postscript for that? :-)<br>
<br>
There are only two possible explanations:<br>
<br>
1) Stupidity<br>
2) Ignorance<br>
<br>
I don't recall which of the two it was it in particular case, but either<br>
way you are right in suggesting that I should have used a postscript :-)<br>
<br>
Looking back through the commit history, it was introduced here:<br>
<br>
Name: Kernel-dtl.856<br>
Author: dtl<br>
Time: 15 June 2014, 10:42:28.524 am<br>
UUID: 5a0967c5-86ae-4631-9d20-d960cd97abb1<br>
Ancestors: Kernel-cmm.855<br>
<br>
Fix inconsistent image state as reported on squeak-dev:<br>
<br>
Date: Wed, 11 Jun 2014 23:44:42 -0400<br>
From: Florin Mateoc<br>
To: The general-purpose Squeak developers list<br>
Subject: [squeak-dev] Class subclasses<br>
<br>
I think this is an old bug, presumably since ProtoObject was introduced<br>
(and presumably because ObjectTracer was used in the process).<br>
<br>
If you ask Class for its subclasses (or if you inspect it) you see that<br>
ObjectTracer class is listed along with ProtoObject class, although<br>
ObjectTracer's superclass is ProtoObject. This can lead to some funny<br>
bugs if you try to write some hierarchy traversing code.<br>
<br>
<br>
For background, the original problem report and discussion are at<br>
<a href="http://lists.squeakfoundation.org/pipermail/squeak-dev/2014-June/178522.html">http://lists.squeakfoundation.org/pipermail/squeak-dev/2014-June/178522.html</a><br>
<br>
Dave<br>
<br>
<br>
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