diff --git a/mlir/lib/ExecutionEngine/SparseUtils.cpp b/mlir/lib/ExecutionEngine/SparseUtils.cpp
--- a/mlir/lib/ExecutionEngine/SparseUtils.cpp
+++ b/mlir/lib/ExecutionEngine/SparseUtils.cpp
@@ -184,6 +184,10 @@
         assert(sparsity[d] == kDense && "singleton not yet supported");
       }
     }
+    // Prepare sparse pointer structures for all dimensions.
+    for (uint64_t d = 0, r = getRank(); d < r; ++d)
+      if (sparsity[d] == kCompressed)
+        pointers[d].push_back(0);
     // Then setup the tensor.
     traverse(tensor, sparsity, 0, nnz, 0);
   }
@@ -224,9 +228,6 @@
       values.push_back(lo < hi ? elements[lo].value : 0);
       return;
     }
-    // Prepare a sparse pointer structure at this dimension.
-    if (sparsity[d] == kCompressed && pointers[d].empty())
-      pointers[d].push_back(0);
     // Visit all elements in this interval.
     uint64_t full = 0;
     while (lo < hi) {