BUG #17313: Exception by opening and closing connection

The following bug has been logged on the website:

Bug reference: 17313
Logged by: José Antonio Lareo Domínguez
Email address: lareomerlin(at)gmail(dot)com
PostgreSQL version: 13.0
Operating system: Windows Server 2012
Description:

Hello,

I have the following exception by opening and closing a connection:

AccessViolationException bei
System.Data.Common.UnsafeNativeMethods.SQLDriverConnectW

I tested the code with multiple OS from Microsoft without problems except in
this particular version.

The operation system is up-to-date, and I tried different versions of the
odbc driver without success. By disabling the connection pooling seems to
avoid the error.
The driver that is causing the exception is the ANSI driver, by using the
Unicode driver the code is running fine.

The following code is a simple example I did to reproduce the error (C#):

========================================================
string connectionString = "Driver={PostgreSQL};Server=IP
address;Port=5432;Database=myDataBase;Uid=myUsername;Pwd=myPassword";

while (true)
{
using (OdbcConnection conn = new OdbcConnection())
{
Console.WriteLine("Opening connection");
conn.ConnectionString = connectionString;
conn.Open();
Thread.Sleep(100);
conn.Close();
Console.WriteLine("Closing connection");
Thread.Sleep(100);
}
}
=========================================

If you need futher information just contact me
Thank you.