Extra properties were causing a crash

SqlMapper.cs

@@ -128,8 +128,6 @@ public bool Equals(Identity other)
             }
         }
 
-      
-
         /// <summary>
         /// Execute parameterized SQL  
         /// </summary>
@@ -421,7 +419,7 @@ private static object GetStructDeserializer<T>(IDataReader reader)
                     Label finishLabel = il.DefineLabel();
 
                     il.Emit(OpCodes.Ldarg_0); // stack is now [target][target][reader]
-                    EmitInt32(il, index++); // stack is now [target][target][reader][index]
+                    EmitInt32(il, index); // stack is now [target][target][reader][index]
 
                     il.Emit(OpCodes.Callvirt, getItem); // stack is now [target][target][value-as-object]
 
@@ -440,6 +438,7 @@ private static object GetStructDeserializer<T>(IDataReader reader)
 
                     il.MarkLabel(finishLabel);
                 }
+                index += 1;
             }
             il.Emit(OpCodes.Ret); // stack is empty
 

Tests.cs

@@ -89,6 +89,22 @@ public class Dog
             public int IgnoredProperty { get { return 1; } }
         }
 
+        public void TestExtraFields()
+        {
+            var guid = Guid.NewGuid();
+            var dog = connection.ExecuteMapperQuery<Dog>("select '' as Extra, 1 as Age, 0.1 as Name1 , Id = @id", new { Id = guid});
+
+            dog.Count()
+               .IsEqualTo(1);
+
+            dog.First().Age
+                .IsEqualTo(1);
+
+            dog.First().Id
+                .IsEqualTo(guid);
+        }
+
+
         public void TestStrongType()
         {
             var guid = Guid.NewGuid();
@@ -104,6 +120,7 @@ public void TestStrongType()
                 .IsEqualTo(guid);
         }
 
+
         public void TestExpando()
         {
             var rows = connection.ExecuteMapperQuery("select 1 A, 2 B union all select 3, 4");