<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 - Don't crash when using -a on non-archives"
   href="https://bugs.llvm.org/show_bug.cgi?id=39402">39402</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Don't crash when using -a on non-archives
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>trunk
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>PC
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Windows NT
          </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>llvm-objdump
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>jh7370.2008@my.bristol.ac.uk
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvm-bugs@lists.llvm.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>-a prints archive headers. It should probably emit a warning/error and not do
anything when specified for a regular object file. However, it instead crashes,
because it attempts to dereference a null pointer:

static void DumpObject(ObjectFile *o, const Archive *a = nullptr,
                       const Archive::Child *c = nullptr) {
...
  if (ArchiveHeaders && !MachOOpt)
    printArchiveChild(a->getFileName(), *c); // a will be null here
...
}</pre>
        </div>
      </p>


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