diff --git a/src/bsdiff/BinaryPatchUtility.cs b/src/bsdiff/BinaryPatchUtility.cs
index 6f1cd01..d35e47a 100644
--- a/src/bsdiff/BinaryPatchUtility.cs
+++ b/src/bsdiff/BinaryPatchUtility.cs
@@ -79,8 +79,8 @@ 0	32	Header
 
 			int[] I = SuffixSort(oldData);
 
-			byte[] db = new byte[newData.Length + 1];
-			byte[] eb = new byte[newData.Length + 1];
+			byte[] db = new byte[newData.Length];
+			byte[] eb = new byte[newData.Length];
 
 			int dblen = 0;
 			int eblen = 0;
@@ -348,7 +348,10 @@ with control block a set of triples (x,y,z) meaning "add x bytes
 							bytesToCopy -= actualBytesToCopy;
 						}
 
-						// sanity-check
+                        if (newPosition == newSize)
+                            return;
+
+                        // sanity-check
 						if (newPosition + control[1] > newSize)
 							throw new InvalidOperationException("Corrupt patch.");