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    <head>
      <base href="https://llvm.org/bugs/" />
    </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 --- - Warn if a value that's been std::move()d from is accessed"
   href="https://llvm.org/bugs/show_bug.cgi?id=27562">27562</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Warn if a value that's been std::move()d from is accessed
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>clang
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>unspecified
          </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>C++
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>nicolasweber@gmx.de
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>dgregor@apple.com, llvm-bugs@lists.llvm.org
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Spot the bug:

  auto insertion_result = allocator_dumps_.insert(
      std::make_pair(mad->absolute_name(), std::move(mad)));
  DCHECK(insertion_result.second) << "Duplicate name: " <<
mad->absolute_name();     


mad is move()d from in the first statement but then accessed in the second.
This is probably almost always a bug. We should warn on it. (I couldn't find an
existing bug for this.)

Maybe this could work similar to -Wuninitialized where we conceptually treat
things that have been move()d from as uninitialized from that point on.</pre>
        </div>
      </p>
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