Error in MySqlCommandBuilder.DeriveParameters() on procedure with Param-Type DECIMAL(10,0) UNSIGNED

[JoySurfer]

Software versions
MySqlConnector version: 2.2.4
Server type (MySQL, MariaDB, Aurora, etc.) and version: MariaDB 10.6.11
.NET version: 4.8.1
(Optional) ORM NuGet packages and versions:

Describe the bug
I want to use MySqlCommandBuilder.DeriveParameters to derive the params of a procedure "TestParam" with Param-Type DECIMAL(10,0) UNSIGNED and get an System.NullReferenceException

I created two procedures to verify, that the error comes from the Param-Type UNSIGNED.
The procedure TestParamX works fine.

CREATE PROCEDURE `TestParam`(
            IN `Param` DECIMAL(10,0) UNSIGNED
            )
        BEGIN

        END

CREATE PROCEDURE `TestParamX`(
            IN `Param` DECIMAL(10,0)
            )
        BEGIN

        END

Exception
System.NullReferenceException
HResult=0x80004003
Nachricht = Der Objektverweis wurde nicht auf eine Objektinstanz festgelegt.
Quelle = MySqlConnector
Stapelüberwachung:
at MySqlConnector.Core.CachedParameter..ctor(Int32 ordinalPosition, String mode, String name, String dataType, Boolean unsigned, Int32 length)
at MySqlConnector.Core.CachedProcedure.d__0.MoveNext()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
at MySqlConnector.MySqlConnection.d__85.MoveNext()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at MySqlConnector.MySqlCommandBuilder.d__3.MoveNext()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at MySqlConnector.MySqlCommandBuilder.DeriveParameters(MySqlCommand command)
at TestParam.Program.Main(String[] args) in

Diese Ausnahme wurde ursprünglich von dieser Aufrufliste ausgelöst:
[Externer Code]
TestParam.Program.Main(string[]) in Program.cs

Code sample

internal class Program
    {
        static void Main(string[] args)
        {
            var _strBuilder = new MySqlConnectionStringBuilder
            {
                Server = <server>,
                Database = <database>,
                UserID = <user>,
                Password = <password>,
                Pooling = true,
            };

            MySqlConnection _conn = new MySqlConnection(_strBuilder.ConnectionString);
            _conn.Open();

            var _cmd1 = new MySqlCommand("TestParamX", _conn)
            {
                CommandType = CommandType.StoredProcedure
            };

            MySqlCommandBuilder.DeriveParameters(_cmd1);

            var _cmd2 = new MySqlCommand("TestParam", _conn)
            {
                CommandType = CommandType.StoredProcedure
            };

            MySqlCommandBuilder.DeriveParameters(_cmd2);

            _conn.Close();
        }
    }

/* A concise code sample to reproduce the bug */

Expected behavior
The MySqlCommandBuilder.DeriveParameters-method should derive the Param-Type DECIMAL(10,0) UNSIGNED without System.NullReferenceException.

Additional context
Add any other context about the problem here.

[bgrainger]

Thanks for the great bug report. This will be fixed in the next release. I can't think of a workaround until then (other than avoiding DeriveParameters).

[bgrainger]

Fixed in 2.2.5.