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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - False positive "potential leak of an object" with wrapper reset method"
href="http://llvm.org/bugs/show_bug.cgi?id=15846">15846</a>
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<th>Summary</th>
<td>False positive "potential leak of an object" with wrapper reset method
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>Macintosh
</td>
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<th>OS</th>
<td>MacOS X
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Static Analyzer
</td>
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<th>Assignee</th>
<td>kremenek@apple.com
</td>
</tr>
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<th>Reporter</th>
<td>bugzilla@jwwalker.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=10427" name="attach_10427" title="RetainCountFalsePositive.cpp">attachment 10427</a> <a href="attachment.cgi?id=10427&action=edit" title="RetainCountFalsePositive.cpp">[details]</a></span>
RetainCountFalsePositive.cpp
Overview:
When using a wrapper class that holds a reference-counted Core Foundation
object, the static analyzer reports a potential leak whenever I have the
wrapper take ownership of an object.
Steps to reproduce:
Analyze the attached Mac C++ source file.
Actual results:
"Potential leak of an object" warning.
Expected results:
No warnings.
Build date:
clang version 3.3 (trunk 180561) (llvm/trunk 180467)
Target: x86_64-apple-darwin11.4.2
Thread model: posix
Additional Information:
If I comment out the line "if (ptr_ != p)" in the Reset method, the warning
goes away. I guess the analyzer is "thinking" that the test might fail, so p
might not be assigned to ptr_. But I can't see any way that
CFStringCreateWithCString could return a pointer that is already in the ptr_
member.</pre>
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