[Bug ada/104767] GNAT.Serial_Communications windows package allows/causes multiple closing of the same windows handle.

[tornenvi at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104767

--- Comment #2 from tornenvi at gmail dot com ---
Created attachment 52558
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52558&action=edit
Test program to demonstrate problem

Adding test program code gnatserialerrortest2.adb to highlight the problem.

The program requires two serial ports, the comport numbers 
are hard coded for simplicity, testers will have to 
modify the code with the comports for their own test environment.