diff --git a/util/sparse_array.h b/util/sparse_array.h
index 86d4d50..2b2d185 100644
--- a/util/sparse_array.h
+++ b/util/sparse_array.h
@@ -431,12 +431,13 @@
     if (sparse_) {
       std::copy_n(sparse_.get(), max_size_, a.get());
     }
-    sparse_ = std::move(a);
 
     std::unique_ptr<IndexValue[]> b(new IndexValue[max_size]);
     if (dense_) {
       std::copy_n(dense_.get(), max_size_, b.get());
     }
+
+    sparse_ = std::move(a);
     dense_ = std::move(b);
 
     MaybeInitializeMemory(max_size_, max_size);
diff --git a/util/sparse_set.h b/util/sparse_set.h
index 3cece2e..18f616a 100644
--- a/util/sparse_set.h
+++ b/util/sparse_set.h
@@ -193,8 +193,9 @@
 template<typename Value>
 void SparseSetT<Value>::resize(int max_size) {
   DebugCheckInvariants();
-  const int old_max_size = dense_.size();
-  if (max_size > old_max_size) {
+  if (max_size > dense_.size()) {
+    const int old_max_size = dense_.size();
+
     PODArray<int> a(max_size);
     if (sparse_.data() != NULL) {
       std::copy_n(sparse_.data(), old_max_size, a.data());