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    <head>
      <base href="http://llvm.org/bugs/" />
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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - Assembler crashes on invalid 'out al, 4'"
   href="http://llvm.org/bugs/show_bug.cgi?id=15945">15945</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Assembler crashes on invalid 'out al, 4'
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>libraries
          </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>MC
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>matthewbg@google.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>chad.rosier@gmail.com, grosbach@apple.com, llvmbugs@cs.uiuc.edu
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Found while playing around with PR15944:
$ clang -x assembler -c -o /dev/null - <<EOF
.intel_syntax noprefix
out al, 4  
EOF 
clang: include/llvm/ADT/SmallVector.h:144: const_reference
llvm::SmallVectorTemplateCommon<llvm::MCOperand, void>::operator[](unsigned
int) const [T = llvm::MCOperand]: Assertion `begin() + idx < end()' failed.</pre>
        </div>
      </p>
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