[Bug 56405] New: WinLink (RMS Express) crash opening serial port

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=56405

Bug ID: 56405
           Summary: WinLink (RMS Express) crash opening serial port
           Product: Wine
           Version: 9.3
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 76170
  --> https://bugs.winehq.org/attachment.cgi?id=76170
Backtrace from crash on Linux

I've reproduced this crashing behaviour on both Linux and macOS.

I run RMS Express, and I connect a Kenwood TH-D72A radio to my computer via its
USB serial cable. I select "Packet Winlink" from the dropdown at the top of the
application and click "Open Session".
In the session window, I click "Settings" and pick the appropriate COM port and
click "Update".
When it tries to initialize the radio TNC, WinLink crashes.

Backtrace attached. I'm happy to run with extra debugging output and submit
logs if someone tells me what flags would be useful. I recognize that
reproducing this might be a challenge given the amateur radio licence
requirement for WinLink and the specific radio hardware involved.