From 46e216279747397507f833e765843467c6f35e40 Mon Sep 17 00:00:00 2001
From: Haiping Chen <haiping008@gmail.com>
Date: Wed, 21 Jun 2023 17:25:17 -0500
Subject: [PATCH] Fix model.evaluate in NeuralNetXorKeras.

---
 src/TensorFlowNET.Core/APIs/c_api.cs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/TensorFlowNET.Core/APIs/c_api.cs b/src/TensorFlowNET.Core/APIs/c_api.cs
index 6049c95c..63bdfd27 100644
--- a/src/TensorFlowNET.Core/APIs/c_api.cs
+++ b/src/TensorFlowNET.Core/APIs/c_api.cs
@@ -53,6 +53,11 @@ namespace Tensorflow
 
         public unsafe static byte[] ByteStringPiece(IntPtr handle)
         {
+            if (handle == IntPtr.Zero)
+            {
+                return new byte[0];
+            }
+
             byte* str_data = (byte*)handle.ToPointer();
             List<byte> bytes = new List<byte>();
             byte current = 255;