<html>
    <head>
      <base href="https://bugs.llvm.org/">
    </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 - Scan-build contradicting assumption"
   href="https://bugs.llvm.org/show_bug.cgi?id=38209">38209</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Scan-build contradicting assumption
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>tools
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>6.0
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>All
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>All
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>enhancement
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>analyze
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>unassignedbugs@nondot.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>Koen.Poppe@vandewiele.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvm-bugs@lists.llvm.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=20567" name="attach_20567" title="Minimal example illustrating contradicting assumptions">attachment 20567</a> <a href="attachment.cgi?id=20567&action=edit" title="Minimal example illustrating contradicting assumptions">[details]</a></span>
Minimal example illustrating contradicting assumptions

Running scan-build-6.0 on the attached code results in contradicting
assumptions:

Step 2) Assuming 'empty()' is false 
Step 5) Assuming 'empty()' is true

Workaround (enable the WORKAROUND define) allows scan-build to reason about
memberPlus100 locally thus avoiding this false positive.

Should scan-build be able to reason about this, knowing that both 'empty()'
calls should result in the same outcome?</pre>
        </div>
      </p>


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