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    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - False positive: memory leak reported for cast to union"
   href="https://llvm.org/bugs/show_bug.cgi?id=25701">25701</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>False positive: memory leak reported for cast to union
          </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>warren@icouldbedeadwrong.net
          </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=15378" name="attach_15378" title="Test case">attachment 15378</a> <a href="attachment.cgi?id=15378&action=edit" title="Test case">[details]</a></span>
Test case

Platform: Ubuntu 14.04.2 LTS
Tool version (svn info):
   URL: <a href="http://llvm.org/svn/llvm-project/cfe/trunk/tools/scan-build">http://llvm.org/svn/llvm-project/cfe/trunk/tools/scan-build</a>
   Relative URL: ^/cfe/trunk/tools/scan-build
   Repository Root: <a href="http://llvm.org/svn/llvm-project">http://llvm.org/svn/llvm-project</a>
   Repository UUID: 91177308-0d34-0410-b5e6-96231b3b80d8
   Revision: 254388

I have written a small test case (see attachment) - this code compiles and
passes through valgrind without issue.  However, scan-build complains about a
possible memory leak, as follows:
/opt/llvm/libexec/ccc-analyzer -o union -g -Wall -Wextra union.c
union.c:25:5: warning: Potential leak of memory pointed to by 'ret'
    return (request_un)ret;
    ^~~~~~~~~~~~~~~~~~~~~~
1 warning generated.

(Note that the memory in question is freed on line 42).</pre>
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