System crash when accessing empty disc drive

[XcomGUIsystem]

hdpmi causes the system to crash or reboot, when accessing empty CD rom drives.

Reproducing the error:

-FreeDOS with uide.sys
-qemu or real computer
-random DJGPP programs chdiring or direnting the CD rom drive
-No disc should be in the CD rom drive. If there is a disc, it works. Surprise.

Reproducing it very quickly:

download this: xcom.infora.hu/xcom144.img
boot it: qemu-system-x86_64 -fda xcom144.img -enable-kvm
open menu/my computer/ D: (cd rom) with double clicking on it

The error:

Program hangs (exception 0x0D in ring 0) or system reboots.

Additional info:

-Since when this bug exists? I dont know, probably a decade, every version is affected.
-chdir already causes the error.

[Baron-von-Riedesel]

I was able to download your image and start it.
However, there are quite a few error messages during startup ("no CDROM drive to use - xxx not loaded").

[XcomGUIsystem]

Thankyou for checking on the report.

This live image tries various cd rom drivers in freedos to initialize cd rom devices.
Thats why the cd rom related error messages are showing up.

That is normal operation, and not related to this issue.

Usually the image ends up detecting the cd rom drive with uide.sys.
If you see a D: in menu/my computer, then that means the cd rom drive was detected.
And its ready to crash the system if you try to open it :D