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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Analyzer misses dangling reference"
href="https://llvm.org/bugs/show_bug.cgi?id=25770">25770</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Analyzer misses dangling reference
</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>
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<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>
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<th>Component</th>
<td>Static Analyzer
</td>
</tr>
<tr>
<th>Assignee</th>
<td>kremenek@apple.com
</td>
</tr>
<tr>
<th>Reporter</th>
<td>t@sharklasers.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=15412" name="attach_15412" title="Code demonstrating the bug">attachment 15412</a> <a href="attachment.cgi?id=15412&action=edit" title="Code demonstrating the bug">[details]</a></span>
Code demonstrating the bug
The code produces a temporary unique_ptr that is dereferenced to obtain a
const& to the managed heap allocated object. unique_ptr is destroyed, deletes
the object and the reference is left dangling.
$ scan-build g++ -std=c++1z dangling_ref.cpp
scan-build: Using 'local/tmp/clang/bin/clang' for static analysis
scan-build: Removing directory '/tmp/scan-build-2015-12-08-145243-7071-1'
because it contains no reports.
scan-build: No bugs found.
Example taken from the talk "CppCon 2015: Herb Sutter "Writing Good C++14... By
Default" at 44:04 (a Microsoft static analysis tool was demonstrated that is
supposedly able to catch this bug)</pre>
</div>
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