    <a href="https://svn.boost.org/trac/boost/ticket/9081" target="_top">9081</a>
          Booleans create self-intersecting polygons from non-self-intersecting polygons
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          <a href="https://svn.boost.org/trac/boost/ticket/9245" target="_top">9245</a>
          Check for process errors in make_qbk.py
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          <a href="https://svn.boost.org/trac/boost/ticket/9563" target="_top">9563</a>
          (Sym)difference not successful, f