(just to prove that #552 still happens even if the only values seen are 0 and 1)

Dapper.Tests/Tests.cs

@@ -3074,12 +3074,12 @@ public void Issue552_SignedUnsignedBooleans()
   truncate table bar;
   insert bar (id, bool_val) values (1, null);
   insert bar (id, bool_val) values (2, 0);
-  insert bar (id, bool_val) values (3, 2);
+  insert bar (id, bool_val) values (3, 1);
   insert bar (id, bool_val) values (4, null);
-  insert bar (id, bool_val) values (5, 3);
+  insert bar (id, bool_val) values (5, 1);
   insert bar (id, bool_val) values (6, 0);
   insert bar (id, bool_val) values (7, null);
-  insert bar (id, bool_val) values (8, 5);");
+  insert bar (id, bool_val) values (8, 1);");
 
                 var rows = conn.Query<MySqlHasBool>("select * from bar;").ToDictionary(x => x.Id);
 

Dapper/SqlMapper.cs

@@ -3097,7 +3097,7 @@ static LocalBuilder GetTempLocal(ILGenerator il, ref Dictionary<Type, LocalBuild
                                 }
                                 else
                                 {
-                                    il.Emit(OpCodes.Unbox_Any, unboxType); // stack is now [target][target][typed-value]
+                                     il.Emit(OpCodes.Unbox_Any, unboxType); // stack is now [target][target][typed-value]
                                 }
                             }
                             else