Open
Description
- [✅] The FAQ doesn't contain a resolution to my issue
Environment
- Minecraft Version: 1.21.x (confirmed on 1.21.4)
- Server Type: PaperMC, running on LAN (also tested on Vanilla & Spigot)
- Mineflayer Version: 4.27.0
- Node.js Version: v22.14.0
- OS: Pop!_OS (Linux)
Problem
The bot crashes whenever an explosion happens nearby (e.g., TNT or Creeper).
It crashes inside mineflayer/lib/plugins/physics.js
at line 299 whenever it tries to process explosion
I think it has something to do with insanely large vector in player knockback.
What did you try yet?
At first, I thought it was caused by my own bot code (~1000+ lines), but I reproduced the bug using a minimal Mineflayer bot that just connects and spawns.
I tested this on:
- PaperMC, Vanilla, and Spigot servers
- LAN setup
- Fresh installs of Mineflayer and Node.js
All setups crash instantly on any explosion.
Minimal Reproduction code
import mineflayer from 'mineflayer';
const bot = mineflayer.createBot({
host: 'localhost',
port: 25565,
username: 'TestBot',
});
bot.on('spawn', () => {
console.log('Bot spawned and ready');
});
Expected behavior
The bot shouldn't crash when an explosion occurs nearby.
Instead, it throws a TypeError
trying to access property which is undefined ;-;
##Error
Chunk size is 53 but only 29 was read ; partial packet : {"name":"explosion","params":{"center":{"x":-2.5531342029571533,"y":1.4030810953376417e-36,"z":-3.218271255493164},"playerKnockback":{"x":-2.0000457763671875,"y":3.550067870195207e-28,"z":-1.3349637409800994e+30},"explosionParticle":{"type":"sweep_attack"},"soundId":16151}}; buffer :21c023668d03eeb8cdc04df828f5c00000c011e10325f186cc013f977eba590495aa3fc6db0ab35ed7abbfdd8c259c914fec15db04
/home/hatadi_v/Desktop/Ply/node_modules/vec3/index.js:82
this.x += other.x
^
TypeError: Cannot read properties of undefined (reading 'x')
at Vec3.add (/home/hatadi_v/Desktop/Ply/node_modules/vec3/index.js:82:21)
at Client.<anonymous> (/home/hatadi_v/Desktop/Ply/node_modules/mineflayer/lib/plugins/physics.js:299:29)
at Client.emit (node:events:530:35)
at emitPacket (/home/hatadi_v/Desktop/Ply/node_modules/minecraft-protocol/src/client.js:84:12)
at FullPacketParser.<anonymous> (/home/hatadi_v/Desktop/Ply/node_modules/minecraft-protocol/src/client.js:113:9)
at FullPacketParser.emit (node:events:518:28)
at addChunk (/home/hatadi_v/Desktop/Ply/node_modules/readable-stream/lib/internal/streams/readable.js:323:12)
at readableAddChunk (/home/hatadi_v/Desktop/Ply/node_modules/readable-stream/lib/internal/streams/readable.js:300:9)
at Readable.push (/home/hatadi_v/Desktop/Ply/node_modules/readable-stream/lib/internal/streams/readable.js:246:10)
at FullPacketParser._transform (/home/hatadi_v/Desktop/Ply/node_modules/protodef/src/serializer.js:89:10)
Node.js v22.14.0
Additional context
I am a beginner to both GitHub and JavaScript . Sorry if i misunderstood something. I tried to include every relevant information!