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<p><b>Steps to reproduce:</b></p>
<p>Do it:</p>
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<p>Object compile: '</p>
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<div>foo: anObject</div>
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<div><span style="white-space:pre"></span>^ self foo</div>
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<div><span style="white-space:pre"></span> flag: #bar;</div>
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<div><span style="white-space:pre"></span> caseOf: { [#corge] -> [self grault: anObject] }</div>
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<div>'</div>
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<p><b style="font-size:12pt">Error:</b><br>
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<p><span style="font-size:12pt">In TempVariableNode >> #isReferencedWithinBlockExtent:: MessageNotUnderstood: UndefinedObject >> #rangleIncludes:.</span></p>
<p><span style="font-size:12pt">anInterval is nil.</span></p>
<p><span style="font-size:12pt">In #<span>computeCopiedValues:, </span>blockExtent of the BlockNode <span>{[#corge]} is nil.</span></span></p>
<p><span style="font-size:12pt"><span><br>
</span></span></p>
<p><span style="font-size:12pt"><span><span style="font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;">This may be related to the </span><span style="font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;">observation
made in </span><a href="http://forum.world.st/BUG-Cannot-compile-cascade-sent-to-block-td5108942.html" class="OWAAutoLink" id="LPlnk553879" previewremoved="true" style="font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;">http://forum.world.st/BUG-Cannot-compile-cascade-sent-to-block-td5108942.html</a><span style="font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;"> that
blockExtent can be nil.</span><br>
</span></span></p>
<p><span style="font-size:12pt"><span>Maybe we should handle optimized BlockNodes differently in this method?</span></span></p>
<p>Not (yet?) further investigated.</p>
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<p>Best,</p>
<p>Christoph</p>
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