Before I begin, I would like to say that this is similar to MC-73884, but I think it is distinct enough to be called separate, because in MC-73884, the thrown objects are breaking on blocks that are in the world. In this bug, thrown objects break on nonexistent blocks, but they don't really break. If it is considered a duplicate, I would like a short description of why as a comment. I will now begin to describe the bug.
What happened...
I was playing Minecraft, and I needed a way to clear out quite a bit of space. So, I made a repeating, unconditional, always active command block with the command /execute @e[type=ThrownEgg] ~ ~ ~ /fill ~-2 ~-2 ~-2 ~2 ~2 ~2 air
(I had experimented with lower numbers, but the egg actually broke before the command was run again). I would throw the egg and it would appear to break as soon as it hit the ground. Then, a large 5X5 column would open up in the ground as the chunk loaded. Sometimes, the egg breaking particle would be displayed, but the particles would follow the same path as the egg would and still make the column. Either way, the command would work.
Affected Entities:
1. ThrownEgg
2. Snowball
Unaffected Entities:
1. ThrownPotion
2. ThrownEnderpearl
3. ThrownExpBottle
Steps to Reproduce...
1. Create a Creative World with Cheats On
2. Give yourself a Command Block with the command: /give @p command_block
3. Place the Command Block and give it the command: /execute @e[type=ThrownEgg] ~ ~ ~ /fill ~-2 ~-2 ~-2 ~2 ~2 ~2 air
.
4. Set the Command Block to a Repeat, Unconditional, and Always Active Command Block.
5. Throw an Egg
6. Watch the Egg
Related issues
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Uh we're on 16w21b not a

Very true, but I forgot to add it for 16w21a.

Confirmed for Pre 1.10

Fixed what? Fixed in 1.10-pre1?

I made a mistake okay?

No need to send a full caps message...

I tested. It is in 1.10 pre-1.

I cannot reproduce this in 1.10.2. This bug has been fixed.