[MC-207900] Summoning "dust" or "dust_color_transition" particles kicks nearby players when on a server

It only happens on multiplayer servers.

The command:

/particle dust 0 0 0 0 ~ ~ ~ 0 0 0 0 0

The kick message is:

Internal Exception: io.netty.handler.codec.DecoderException: java.io.IOException: Packet 0/35 (qk) was larger than I expected, found 12 bytes extra whilst reading packet 35

Code Analysis

Code analysis by @unknown can be found in this comment.

Linked issues

is duplicated by 2

MC-208780 Dust particles kick clients on servers Resolved

MC-209338 Dust Particles with /particle on a server crash the game Resolved

Comments 4

[Mod] markderickson 2020-12-08T04:25:40Z

Can confirm.

Francielly 2020-12-12T09:36:30Z

The same error also happens with the particle "dust_color_transition".

Nassim Jahnke 2020-12-17T11:29:54Z

Codewise, this is due to color vectors being written as doubles, but read as floats (see DustParticleOptions fromNetwork vs. DustParticleOptionsBase#writeToNetwork)

RlaChi 2021-01-21T06:34:21Z

I lost my 20w49a server because I put /particle dust_color_transition command on repeating command block

Thanks for fixing this mojang

I'm first to Jira so if this type of comments are not allowed please let me know