<html>
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<base href="https://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW " title="NEW --- - Failure to find double delete" href="https://urldefense.proofpoint.com/v2/url?u=https-3A__llvm.org_bugs_show-5Fbug.cgi-3Fid-3D24170&d=AwMBaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=pF93YEPyB-J_PERP4DUZOJDzFVX5ZQ57vQk33wu0vio&m=L_5hbdmwH7sFL7wev5zkSCDVVHYYyIGqFY4LNpAkf6A&s=5BlW70WiYCF8DDsCmF0wrEWcCjYIIjQtaeEF7G4enI8&e=">24170</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Failure to find double delete
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Static Analyzer
</td>
</tr>
<tr>
<th>Assignee</th>
<td>kremenek@apple.com
</td>
</tr>
<tr>
<th>Reporter</th>
<td>vabanque@gmx.net
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=14604" name="attach_14604" title="shows correctly detected error">attachment 14604</a> <a href="attachment.cgi?id=14604&action=edit" title="shows correctly detected error">[details]</a></span>
shows correctly detected error
file1.cpp shows that the analyzer can detect a double delete caused by an
incorrect copy constructor.
$ scan_build clang++ file1.cpp
scan-build: Using 'clang/bin/clang' for static analysis
file1.cpp:9:9: warning: Attempt to free released memory
delete [] data;
^~~~~~~~~~~~~~
file2.cpp shows how the analyzer fails to detect a similar mistake in a copy
assignment operator.
$ scan_build clang++ file2.cpp
scan-build: Using '/clang/bin/clang' for static analysis
scan-build: Removing directory '/tmp/scan-build-2015-07-17-211038-16264-1'
because it contains no reports.
scan-build: No bugs found
$ clang -v
clang version 3.8.0 (trunk 242502)
Target: x86_64-unknown-linux-gnu
Thread model: posix
Found candidate GCC installation:
gcc4.9.2/lib/gcc/x86_64-unknown-linux-gnu/4.9.2
Found candidate GCC installation:
gcc4.9.2/lib64/gcc/x86_64-unknown-linux-gnu/4.9.2
Selected GCC installation: gcc4.9.2/lib64/gcc/x86_64-unknown-linux-gnu/4.9.2
Candidate multilib: .;@m64
Selected multilib: .;@m64</pre>
</div>
</p>
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