Internal exception when picking blocks not in hotbar but in inventory

Crash when middle-clicking a placed block where that block exists in my inventory but isn't on my toolbar.

Steps to reproduce:

1. Go into Survival mode if not in it already
2. Obtain 2 of the same block (e. g. dirt)
3. Place a block down
4. Put the other block in your inventory
5. Pick block the block that was placed down