Updating to v10.0.1 causes OpenConnectionAsync to hang forever #6467
Description
Code that works just fine in v9.0.4 causes the application to hang indefinitely in v10.0.1.
Reproduction:
string connString = "Host=localhost;Port=5432;Username=user;Password=pwd;Database=database";
NpgsqlConnectionStringBuilder connectionStringBuilder = new(connString);
NpgsqlDataSource? dataSource = NpgsqlDataSource.Create(connectionStringBuilder);
await using (NpgsqlConnection pConnection = await dataSource!.OpenConnectionAsync()) ← permanent hang
When I pause in the debugger, I can see one thread with a pretty huge call stack that appears to be somewhere down in the security end of things. Downgrading to 9.0.4 fixes the problem.
