Error on compilation with function using exception filter

PLCnext Engineer
1

Using Plcnext 2022.9 the following code is successfully compiled with visual studio and the generated pcwlx can be imported into plcnext engineer but building fail with error E3004 : evaluation stack corrupted

catch (IOException ioex) when (ioex.InnerException is SocketException)
{
       Console.WriteLine("QueryDataFromClimats IOException: SocketException errorcode {0}", ((SocketException)ioex.InnerException).ErrorCode);
}
Code not using when filter is successfully compiled by plcnext engineer.
 catch (IOException ioex)// when (ioex.InnerException is SocketException)
      {
        if(ioex.InnerException is SocketException)
        {
          Console.WriteLine("QueryDataFromClimats IOException: SocketException errorcode {0}", ((SocketException)ioex.InnerException).ErrorCode);
        }

Regards Alexandre

2

Hello Alexandre,
I have provided your report to development and the issue will be investigated. I assume it is a compiler error. Could you send me a short feedback, wich Template/Language you are using?
I assume it is C# eCLR (provided with PLCnext C# Template in VS).
Thanks & Best Regards
Eduard

3

Hello Alexandre,
I got the information from development, that the generated CIL-code for the “when” modifier is not supported by the eCLR backend compiler. The constraints section of eCLR-Programming-Reference.chm will be extended concerning this issue.
BR Eduard