<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 - Invalid OpenMP loop code causes crash"
   href="https://bugs.llvm.org/show_bug.cgi?id=46730">46730</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Invalid OpenMP loop code causes crash
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>OpenMP
          </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>enhancement
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>Clang Compiler Support
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>rofirrim@gmail.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvm-bugs@lists.llvm.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>The following invalid OpenMP code crashes clang when using `-fopenmp`

  class S {
      public:
      operator int();
      S& operator+=(int);
  };

  int main() {
      S s1;
      #pragma omp taskloop
      for (S s = S(); s < s1; s += 1)
      {}
  }

Curiously `parallel for` does not fail so perhaps the observed crash is due to
something related to task constructs.

However both gcc and icc reject this loop (including the equivalent `[parallel
]for`) so it looks like clang should reject it too. My understanding is that
variables of class `S` are not random access iterators.

Kind regards,</pre>
        </div>
      </p>


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