The bug

I was playing with some of the 17w49b snapshot features, building some stuff, and I teleported a slime with {Size:1,Invulnerable:1b,NoAI:1b,NoGravity:1b} tags (though that doesn't affect the bug) inside a block. I wanted to remove that block using /setblock and then auto-complete the coordinates, but my game crashed!

Steps to reproduce

1. Go into a world in 17w50a
2. Spawn an entity (minecraft:slime recommended with {Size:1,NoAI:1b} tags)
3. Look at the entity and press the SLASH (/) key
4. Type in /setblock and try to auto-complete the coordinates
5. The game crashes.

Note

The crash timing depends on the "Command suggestion" option in
Esc --> Settings --> Chat settings.

• If on, the crash ocurrs when pressing space after typing in "/setblock"
• If off, the crash ocurrs when trying to auto complete coordinates, inputting them without pressing tab doesn't crash the game. (not tested)