Steps to reproduce

• Place down/find a monster spawner
• Type /give <your name> spawn_egg 1 71 <---this number can be anything between 71 and 89 inclusive, as long as the numerical ID does not correspond to any mob then it the bug will work

WARNING! doing this will freeze your game, just restart your computer if that happens.

(please inform me if it crashes, because I restarted my computer after a minute but it may eventually crash if anyone has the patience to wait for it to do so)