https://github.com/RenderKit/embree/commit/cda4cf1919bb2a748e78915fbd6e421a1056638d

Index: thirdparty/embree/kernels/subdiv/bezier_curve.h
--- thirdparty/embree/kernels/subdiv/bezier_curve.h.orig
+++ thirdparty/embree/kernels/subdiv/bezier_curve.h
@@ -135,7 +135,7 @@ namespace embree
       }
       
       friend embree_ostream operator<<(embree_ostream cout, const QuadraticBezierCurve& a) {
-        return cout << "QuadraticBezierCurve ( (" << a.u.lower << ", " << a.u.upper << "), " << a.v0 << ", " << a.v1 << ", " << a.v2 << ")";
+        return cout << "QuadraticBezierCurve (" << a.v0 << ", " << a.v1 << ", " << a.v2 << ")";
       }
     };
   
