diff --git a/Eigen/src/Core/Assign.h b/Eigen/src/Core/Assign.h
index fdc6577fb..d744a15a4 100644
--- a/Eigen/src/Core/Assign.h
+++ b/Eigen/src/Core/Assign.h
@@ -106,7 +106,7 @@ struct ei_assign_novec_CompleteUnrolling
 
   inline static void run(Derived1 &dst, const Derived2 &src)
   {
-    dst.coeffRef(row, col) = src.coeff(row, col);
+    dst.copyCoeff(row, col, src);
     ei_assign_novec_CompleteUnrolling<Derived1, Derived2, Index+1, Stop>::run(dst, src);
   }
 };
@@ -125,7 +125,7 @@ struct ei_assign_novec_InnerUnrolling
     const bool rowMajor = int(Derived1::Flags)&RowMajorBit;
     const int row = rowMajor ? row_or_col : Index;
     const int col = rowMajor ? Index : row_or_col;
-    dst.coeffRef(row, col) = src.coeff(row, col);
+    dst.copyCoeff(row, col, src);
     ei_assign_novec_InnerUnrolling<Derived1, Derived2, Index+1, Stop>::run(dst, src, row_or_col);
   }
 };
@@ -154,7 +154,7 @@ struct ei_assign_innervec_CompleteUnrolling
 
   inline static void run(Derived1 &dst, const Derived2 &src)
   {
-    dst.template writePacket<Aligned>(row, col, src.template packet<Aligned>(row, col));
+    dst.template copyPacket<Derived2, Aligned>(row, col, src);
     ei_assign_innervec_CompleteUnrolling<Derived1, Derived2,
       Index+ei_packet_traits<typename Derived1::Scalar>::size, Stop>::run(dst, src);
   }
@@ -173,7 +173,7 @@ struct ei_assign_innervec_InnerUnrolling
   {
     const int row = int(Derived1::Flags)&RowMajorBit ? row_or_col : Index;
     const int col = int(Derived1::Flags)&RowMajorBit ? Index : row_or_col;
-    dst.template writePacket<Aligned>(row, col, src.template packet<Aligned>(row, col));
+    dst.template copyPacket<Derived2, Aligned>(row, col, src);
     ei_assign_innervec_InnerUnrolling<Derived1, Derived2,
       Index+ei_packet_traits<typename Derived1::Scalar>::size, Stop>::run(dst, src, row_or_col);
   }
@@ -209,9 +209,9 @@ struct ei_assign_impl<Derived1, Derived2, NoVectorization, NoUnrolling>
       for(int i = 0; i < innerSize; i++)
       {
         if(int(Derived1::Flags)&RowMajorBit)
-          dst.coeffRef(j, i) = src.coeff(j, i);
+          dst.copyCoeff(j, i, src);
         else
-          dst.coeffRef(i, j) = src.coeff(i, j);
+          dst.copyCoeff(i, j, src);
       }
   }
 };
@@ -256,9 +256,9 @@ struct ei_assign_impl<Derived1, Derived2, InnerVectorization, NoUnrolling>
       for(int i = 0; i < innerSize; i+=packetSize)
       {
         if(int(Derived1::Flags)&RowMajorBit)
-          dst.template writePacket<Aligned>(j, i, src.template packet<Aligned>(j, i));
+          dst.template copyPacket<Derived2, Aligned>(j, i, src);
         else
-          dst.template writePacket<Aligned>(i, j, src.template packet<Aligned>(i, j));
+          dst.template copyPacket<Derived2, Aligned>(i, j, src);
       }
   }
 };
@@ -302,11 +302,11 @@ struct ei_assign_impl<Derived1, Derived2, LinearVectorization, NoUnrolling>
 
     for(int index = 0; index < alignedSize; index += packetSize)
     {
-      dst.template writePacket<Aligned>(index, src.template packet<Aligned>(index));
+      dst.template copyPacket<Derived2, Aligned>(index, src);
     }
 
     for(int index = alignedSize; index < size; index++)
-      dst.coeffRef(index) = src.coeff(index);
+      dst.copyCoeff(index, src);
   }
 };
 
@@ -344,18 +344,18 @@ struct ei_assign_impl<Derived1, Derived2, SliceVectorization, NoUnrolling>
       for (int index = 0; index<alignedInnerSize ; index+=packetSize)
       {
         if(Derived1::Flags&RowMajorBit)
-          dst.template writePacket<Unaligned>(i, index, src.template packet<Unaligned>(i, index));
+          dst.template copyPacket<Derived2, Unaligned>(i, index, src);
         else
-          dst.template writePacket<Unaligned>(index, i, src.template packet<Unaligned>(index, i));
+          dst.template copyPacket<Derived2, Unaligned>(index, i, src);
       }
 
       // do the non-vectorizable part of the assignment
       for (int index = alignedInnerSize; index<innerSize ; index++)
       {
         if(Derived1::Flags&RowMajorBit)
-          dst.coeffRef(i, index) = src.coeff(i, index);
+          dst.copyCoeff(i, index, src);
         else
-          dst.coeffRef(index, i) = src.coeff(index, i);
+          dst.copyCoeff(index, i, src);
       }
     }
   }
diff --git a/Eigen/src/Core/Coeffs.h b/Eigen/src/Core/Coeffs.h
index 0f87099e2..e21083664 100644
--- a/Eigen/src/Core/Coeffs.h
+++ b/Eigen/src/Core/Coeffs.h
@@ -280,5 +280,40 @@ inline void MatrixBase<Derived>::writePacket
   derived().template writePacket<StoreMode>(index,x);
 }
 
+template<typename Derived>
+template<typename OtherDerived>
+inline void MatrixBase<Derived>::copyCoeff(int row, int col, const MatrixBase<OtherDerived>& other)
+{
+  ei_internal_assert(row >= 0 && row < rows()
+                     && col >= 0 && col < cols());
+  derived().coeffRef(row, col) = other.derived().coeff(row, col);
+}
+
+template<typename Derived>
+template<typename OtherDerived>
+inline void MatrixBase<Derived>::copyCoeff(int index, const MatrixBase<OtherDerived>& other)
+{
+  ei_internal_assert(index >= 0 && index < size());
+  derived().coeffRef(index) = other.derived().coeff(index);
+}
+
+template<typename Derived>
+template<typename OtherDerived, int LoadStoreMode>
+inline void MatrixBase<Derived>::copyPacket(int row, int col, const MatrixBase<OtherDerived>& other)
+{
+  ei_internal_assert(row >= 0 && row < rows()
+                     && col >= 0 && col < cols());
+  derived().template writePacket<LoadStoreMode>(row, col,
+    other.derived().template packet<LoadStoreMode>(row, col));
+}
+
+template<typename Derived>
+template<typename OtherDerived, int LoadStoreMode>
+inline void MatrixBase<Derived>::copyPacket(int index, const MatrixBase<OtherDerived>& other)
+{
+  ei_internal_assert(index >= 0 && index < size());
+  derived().template writePacket<LoadStoreMode>(index,
+    other.derived().template packet<LoadStoreMode>(index));
+}
 
 #endif // EIGEN_COEFFS_H
diff --git a/Eigen/src/Core/MatrixBase.h b/Eigen/src/Core/MatrixBase.h
index 4b2c26341..f5ffbed56 100644
--- a/Eigen/src/Core/MatrixBase.h
+++ b/Eigen/src/Core/MatrixBase.h
@@ -253,6 +253,15 @@ template<typename Derived> class MatrixBase
     Scalar& coeffRef(int index);
     Scalar& operator[](int index);
 
+    template<typename OtherDerived>
+    void copyCoeff(int row, int col, const MatrixBase<OtherDerived>& other);
+    template<typename OtherDerived>
+    void copyCoeff(int index, const MatrixBase<OtherDerived>& other);
+    template<typename OtherDerived, int LoadStoreMode>
+    void copyPacket(int row, int col, const MatrixBase<OtherDerived>& other);
+    template<typename OtherDerived, int LoadStoreMode>
+    void copyPacket(int index, const MatrixBase<OtherDerived>& other);
+
     template<int LoadMode>
     PacketScalar packet(int row, int col) const;
     template<int StoreMode>
diff --git a/Eigen/src/Geometry/Transform.h b/Eigen/src/Geometry/Transform.h
index 846ec2c8d..158624617 100644
--- a/Eigen/src/Geometry/Transform.h
+++ b/Eigen/src/Geometry/Transform.h
@@ -170,7 +170,7 @@ public:
     const OrientationType& orientation, const MatrixBase<ScaleDerived> &scale);
 
   /** \sa MatrixBase::inverse() */
-  const Inverse<MatrixType, false> inverse() const
+  const MatrixType inverse() const
   { return m_matrix.inverse(); }
 
 protected: