[4.7.0+] Very Fatal Error with ZForms

[Mikk-]

Very frequently, gzdoom with crash with a very fatal error when using this demo mod. It uses ZForms to display a list of items in the player's inventory, the player can equip these items using the menu. Tested in both 4.7.0 & latest devbuild

To replicate:

1. Launch GZDoom with the attached mod
2. open the menu using OpenMenu bb_runeMenu
3. equip some runes by clicking on the big rectangles, then the smaller squares on the right
4. run around a bit, change map or quit the game
5. crash.

crashreport.zip & mod :
https://drive.google.com/file/d/1-GFfrH ... sp=sharing
zforms:
https://gitlab.com/Gutawer/gzdoom-zforms

the menu's code is in the core zscript.zsc file, any ancillary code is contained in crap.zsc

apologies in advance if this is [user error].

[Graf Zahl]

I can tell you that this is GC related, something calls Destroy on a stale object which obviously fails.