Graphics windows flashes and closes on Portacle/SBCL on Win11 x64

[rpherman]

All seems to work without any errors thrown, but a graphics window seems to flash and close on my Windows 11 box running SBCL in a Portacale/Emacs setup. The tests run and say success in the REPL without a graphics window to view any output. Thanks!

[Kaveh Kardan]

Thanks for reporting this. Perhaps someone with a Windows machine can test it?