If you try to spawn a mob in with a spawn egg, but you miss the targeted block by just a little bit, the spawn egg will appear to be placed despite the spawn failing and the egg not being consumed.

To reproduce:

1. Get spawn eggs.
2. Switch to survival mode.
3. Try to spawn something in that is outside of your reach but just by a fraction of a block.

The spawn egg appears to work, but fails.

This was discovered while testing MC-214735.