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    <head>
      <base href="https://bugs.llvm.org/">
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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 - Clang seg fault triggered by defaulted template template parameter calculated from other template parameter"
   href="https://bugs.llvm.org/show_bug.cgi?id=43115">43115</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Clang seg fault triggered by defaulted template template parameter calculated from other template parameter
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>8.0
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Macintosh
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>MacOS X
          </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>jonesconrad1@gmail.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
          </td>
        </tr></table>
      <p>
        <div>
        <pre>template <size_t index, typename ARG, E enumVal = static_cast<E>(index),
template <typename> typename CONSTRAINT = PT<enumVal>::template constraint>

line 609827 of attached file coreaudiodevice.mm

and line 609860

it was able to compile once i removed the defaulted type for the template
template parameter CONSTRAINT and moved the "calculation" of this to the
calling function</pre>
        </div>
      </p>


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