Iron pickaxes breaking crash game

So I thought at first it was placing a cobblestone block that caused this, but it was actually the moment I mine-broke the iron pickaxe in my hand. I haven't tried other pickaxes but maybe they are crashing too. I thought maybe this was a duplicate because other posts came up when searching, but they were from 2013, so I thought this would be ok.

Cheers!

Aidan