https://gyazo.com/2479dc1bebfec12a5fea4886aed5a9d6
my crafting queue was actually pretty simple, just a single item, just a lot of it tho
https://gyazo.com/0cb130f5ec421c10204659710512457b
specifically tried crafting to front something else

Yes I was afraid of this. Did this come up as an actual situation or were you just trying to break it? I appreciate the bug report either way, just curious haha

Unfortunately the API has limitations. You're not really supposed to change the functionality of the hand crafting queue in the way that I did so I use a crude work-around that unfortunately is subject to the limitations of the data types given. I may be able to fix this specific problem but at some point there is a limit on the size of the queue that you can use front queueing on. If I were a proper programmer I would output an error instead of letting it crash (and I could probably push the limit up really high by messing with stack sizes) but alas, I am lazy.

It was actual gameplay, kinda,
In seablock you can craft cellulose fiber for free,
If you shift click craft a free craft like that it does only 2k, I planned on leaving it overnight so I used a macro to mass shift click it, hence 167k queue. Wanted to craft something else before I left for the night and thus that error.

Im not hoping for a wonder solution, A simple catch to prevent the error, and a msg informing the play that it can’t be done or just telling the player to cancel some crafting.

done