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            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - New tests introduced in r188545 fail on 32 bit ARM"
   href="https://bugs.webkit.org/show_bug.cgi?id=148376#c18">Comment # 18</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - New tests introduced in r188545 fail on 32 bit ARM"
   href="https://bugs.webkit.org/show_bug.cgi?id=148376">bug 148376</a>
              from <span class="vcard"><a class="email" href="mailto:sbarati&#64;apple.com" title="Saam Barati &lt;sbarati&#64;apple.com&gt;"> <span class="fn">Saam Barati</span></a>
</span></b>
        <pre>(In reply to <a href="show_bug.cgi?id=148376#c17">comment #17</a>)
<span class="quote">&gt; Comment on <span class=""><a href="attachment.cgi?id=261574&amp;action=diff" name="attach_261574" title="Patch">attachment 261574</a> <a href="attachment.cgi?id=261574&amp;action=edit" title="Patch">[details]</a></span>
&gt; Patch
&gt; 
&gt; View in context:
&gt; <a href="https://bugs.webkit.org/attachment.cgi?id=261574&amp;action=review">https://bugs.webkit.org/attachment.cgi?id=261574&amp;action=review</a>
&gt; 
&gt; &gt;&gt; Source/JavaScriptCore/dfg/DFGSpeculativeJIT.cpp:4660
&gt; &gt;&gt; +        DFG_TYPE_CHECK(thisValue.jsValueRegs(), node-&gt;child2(), SpecCell, m_jit.branchIfNotCell(thisValue.jsValueRegs()));
&gt; &gt; 
&gt; &gt; When would this ever not be a cell?
&gt; 
&gt; At start child2 type is SpeculatedType SpecHeapTop  = 0x3bbfffff -&gt; after
&gt; this line it converts to SpeculatedType SpecCell = 0x000fffff
&gt; Without this line this code raise ASSERT error in following module
&gt; <a href="https://github.com/WebKit/webkit/blob/master/Source/JavaScriptCore/dfg/">https://github.com/WebKit/webkit/blob/master/Source/JavaScriptCore/dfg/</a>
&gt; DFGAbstractInterpreterInlines.h#L120
&gt; and it says that it expect Cell but there was Top. 
&gt; In JSVALUE64 branch this type check is done by following statement
&gt; SpeculateCellOperand thisValue(this, node-&gt;child2()); (4653)</span >

Oh, right. The &quot;this&quot; value could be the empty value.</pre>
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