Factorio Forums

player.hand_location returns

inventory :: defines.inventory
slot :: uint

If you access hand_location whilst holding a blueprint in the 3rd slot of a blueprint book in the players inventory then it will have inventory = 1, slot = 3. If you then write that same information back to player.hand_location it will not behave as expected (and crash if there is already an item in the 3rd slot of the player's inventory).

This means that in certain situations will cause the mod to crash.

I'm not sure if this will get fixed. Adding read/write support for the hand location to the mod API was a "well I guess; if it works" but it has always been a super iffy thing to allow mods to touch.

The "fix" might be to just remove writing from the mod API.

Rseding91 wrote: ↑

Fri Dec 18, 2020 5:03 pm

The "fix" might be to just remove writing from the mod API.

Please don't do that! I don't actually need to access the hand inside of blueprint books, it just came up because my mod was running a piece of code when it wasn't supposed to and I thought that it should be reported. Just a simple warning in the docs would be sufficient