From 48ccc08a8b7923d41845e3dcd8e191e5bc1a6b51 Mon Sep 17 00:00:00 2001
From: "A. Unique TensorFlower" <gardener@tensorflow.org>
Date: Fri, 5 Jun 2020 22:41:51 -0700
Subject: [PATCH] Fixing nondeterministic nullptr access.

PiperOrigin-RevId: 315050926
Change-Id: I6817c077c00118bf336848f0ff578125a4880023
---
 tensorflow/core/kernels/sparse_add_op.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tensorflow/core/kernels/sparse_add_op.cc b/tensorflow/core/kernels/sparse_add_op.cc
index d16317af671..0cf40a709a3 100644
--- a/tensorflow/core/kernels/sparse_add_op.cc
+++ b/tensorflow/core/kernels/sparse_add_op.cc
@@ -159,7 +159,9 @@ class SparseAddOp : public OpKernel {
       out_indices_mat.chip<0>(i) =
           from_a ? a_indices_mat.chip<0>(idx) : b_indices_mat.chip<0>(idx);
     }
-    std::copy_n(out_values.begin(), sum_nnz, &out_values_flat(0));
+    if (sum_nnz > 0) {
+      std::copy_n(out_values.begin(), sum_nnz, &out_values_flat(0));
+    }
     ctx->set_output(2, *a_shape);
   }
 };