merge

Eigen/src/Cholesky/LDLT.h

@@ -322,7 +322,7 @@ template<typename Derived>
 inline const LDLT<typename MatrixBase<Derived>::PlainObject>
 MatrixBase<Derived>::ldlt() const
 {
-  return derived();
+  return LDLT<PlainObject>(derived());
 }
 
 #endif // EIGEN_LDLT_H

Eigen/src/LU/FullPivLU.h

@@ -251,6 +251,7 @@ template<typename _MatrixType> class FullPivLU
     {
       m_usePrescribedThreshold = true;
       m_prescribedThreshold = threshold;
+      return *this;
     }
 
     /** Allows to come back to the default behavior, letting Eigen use its default formula for