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    <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 - error: clang frontend command failed with exit code 134"
   href="https://bugs.llvm.org/show_bug.cgi?id=49680">49680</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>error: clang frontend command failed with exit code 134
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>11.0
          </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>enhancement
          </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>alex.warg@gmx.de
          </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>Created <span class=""><a href="attachment.cgi?id=24675" name="attach_24675" title="Example source code (reduced)">attachment 24675</a> <a href="attachment.cgi?id=24675&action=edit" title="Example source code (reduced)">[details]</a></span>
Example source code (reduced)

Clang compiler (version clang 9 - clang 13) crash when compiling the following
code:

class Promise_impl {
};
class Promise {
  using Impl = Promise_impl;
  Impl *p;
public:

  Promise() {
      if (p)
        void *h = __builtin_coro_promise(p, __alignof(Promise_impl), true);
  }
} c_func_u;</pre>
        </div>
      </p>


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