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<p>Hi Marcel,</p>
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<p>weird, I cannot reproduce this.</p>
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<p><span>"Class allSubInstances select: [:c | c category isNil]"</span><br>
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<p><span>gives me a handful Player subclasses.</span></p>
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<div><font size="3" color="black"><span style="font-size:12pt"><a href="http://www.hpi.de/" target="_blank" rel="noopener noreferrer" id="LPNoLP"><font size="2"><span id="LPlnk909538"><font color="#757B80"></font></span></font></a></span></font></div>
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<div class="_rp_T4" id="Item.MessagePartBody">> <span style="font-size: 12pt;">"ReleaseBuilder prepareSourceCode; clearCaches"</span></div>
<div class="_rp_T4" id="Item.MessagePartBody"><span style="font-size: 12pt;">I can't execute this, I have too many packages installed that override critical system methods ...</span></div>
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<div class="_rp_T4" id="Item.MessagePartBody">(It would be great if we had some "recover stashed code" logic someday: If a package is uninstalled, don't remove all extension methods, but check for previous versions that are not in the package which is currently to
be uninstalled and, if found, revert to the latest original version.)</div>
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<div class="_rp_T4" id="Item.MessagePartBody">Best,</div>
<div class="_rp_T4" id="Item.MessagePartBody">Christoph</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>Von:</b> Squeak-dev <squeak-dev-bounces@lists.squeakfoundation.org> im Auftrag von Taeumel, Marcel<br>
<b>Gesendet:</b> Freitag, 13. Dezember 2019 19:26:00<br>
<b>An:</b> John Pfersich via Squeak-dev<br>
<b>Betreff:</b> Re: [squeak-dev] Possible buggy senders of Class >> #category?</font>
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Hi Christoph,
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<div>no, the return value of "someClass category" should never be 'nil'. </div>
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<div>> <span style="font-family: Calibri, Helvetica, sans-serif;font-size: 16px">but I guess it happened in the context of uniclasses.</span></div>
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<div>Uniclasses should be stored in #UserObjects.</div>
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<div>> <span style="font-family: Calibri, Helvetica, sans-serif;font-size: 16px">Should we make the following change?</span></div>
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<div><span style="font-family: Calibri, Helvetica, sans-serif;font-size: 16px">Please don't. Instead, make sure that after </span></div>
<div><span style="font-family: Calibri, Helvetica, sans-serif;font-size: 16px">"ReleaseBuilder prepareSourceCode; clearCaches"</span></div>
<div>all those strange classes are either gone or fixed.</div>
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<div>Best,</div>
<div>Marcel</div>
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<p style="color: #AAAAAA; margin-top: 10px;">Am 13.12.2019 19:13:12 schrieb Thiede, Christoph <christoph.thiede@student.hpi.uni-potsdam.de>:</p>
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<p>Hi all,</p>
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<p>is it a valid state for a class's category to be nil? I recently got an error in Class >> #isDeprecated because [self category] was nil. Unfortunately, I cannot reproduce it, but I guess it happened in the context of uniclasses.</p>
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<p>Should we make the following change?</p>
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<p><img size="23062" contenttype="image/png" id="img683847" style="max-width: 99.9%; user-select: none;" contextid="img846133" tabindex="0" src="cid:b65ea2d7-e24e-4478-a442-664800dfd389"><!-- </img> --><br>
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<p>Best,</p>
<p>Christoph</p>
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