diff --git a/Eigen/src/SparseCore/CompressedStorage.h b/Eigen/src/SparseCore/CompressedStorage.h
index 5af270bc5..d667944ce 100644
--- a/Eigen/src/SparseCore/CompressedStorage.h
+++ b/Eigen/src/SparseCore/CompressedStorage.h
@@ -229,8 +229,10 @@ class CompressedStorage
       internal::scoped_array<Scalar> newValues(size);
       internal::scoped_array<StorageIndex> newIndices(size);
       Index copySize = (std::min)(size, m_size);
-      internal::smart_copy(m_values, m_values+copySize, newValues.ptr());
-      internal::smart_copy(m_indices, m_indices+copySize, newIndices.ptr());
+      if (copySize>0) {
+        internal::smart_copy(m_values, m_values+copySize, newValues.ptr());
+        internal::smart_copy(m_indices, m_indices+copySize, newIndices.ptr());
+      }
       std::swap(m_values,newValues.ptr());
       std::swap(m_indices,newIndices.ptr());
       m_allocatedSize = size;
diff --git a/unsupported/Eigen/CXX11/src/Tensor/TensorIntDiv.h b/unsupported/Eigen/CXX11/src/Tensor/TensorIntDiv.h
index 108c45a32..1de6ce3b4 100644
--- a/unsupported/Eigen/CXX11/src/Tensor/TensorIntDiv.h
+++ b/unsupported/Eigen/CXX11/src/Tensor/TensorIntDiv.h
@@ -58,7 +58,7 @@ struct TensorIntDivisor {
    EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE TensorIntDivisor(const T divider) {
     const int N = 32;
     eigen_assert(divider > 0);
-    eigen_assert(divider <= (1<<(N-1)) - 1);
+    eigen_assert(divider <= (1U<<(N-1)) - 1);
 
     // fast ln2
     const int leading_zeros = count_leading_zeros(divider);