panic: runtime error: slice bounds out of range [16:0]

[turfaa]

What is the issue you are having? Panic when calling Get()

2020-11-26 14:27:29.336176 I | Allocated new queue in 841.579µs; Capacity: 2340000
panic: runtime error: slice bounds out of range [16:0]

goroutine 33821663 [running]:
github.com/allegro/bigcache/v2.readKeyFromEntry(...)
	/root/go/pkg/mod/github.com/allegro/bigcache/[email protected]/encoding.go:47
github.com/allegro/bigcache/v2.(*cacheShard).get(0xc0259f10e0, 0xc057fafac0, 0x20, 0x2f40a1f0106a7737, 0x0, 0x0, 0xc057fe9490, 0xc057fcdc40, 0xc05830adb0)
	/root/go/pkg/mod/github.com/allegro/bigcache/[email protected]/shard.go:69 +0x657
github.com/allegro/bigcache/v2.(*BigCache).Get(0xc00230aa90, 0xc057fafac0, 0x20, 0x2741b20, 0xc058332f70, 0x0, 0x0, 0x0)
	/root/go/pkg/mod/github.com/allegro/bigcache/[email protected]/bigcache.go:117 +0x8b

What is BigCache doing that it shouldn't? Panic

Minimal, Complete, and Verifiable Example

My service do a high number of get operations.

This is my config:

expiry := 7 * time.Minute
conf := bigcache.DefaultConfig(expiry)
conf.CleanWindow = expiry * 3
conf.HardMaxCacheSize = 8192
conf.OnRemoveWithReason = func(_ string, entry []byte, reason bigcache.RemoveReason) {
    // monitoring
}

Environment:

• Version (git sha or release): v2.2.4
• OS (e.g. from /etc/os-release or winver.exe): Ubuntu 16.04.6 LTS
• go version: 1.15

[a2dict]

the key is too long.

example:

package main

import (
	"time"

	"github.com/allegro/bigcache/v2"
)

func main() {
	c := bigcache.DefaultConfig(3 * time.Second)
	ca, err := bigcache.NewBigCache(c)
	if err != nil {
		panic(err)
	}
	
	k := make([]byte, 65530)// 1<<16-18+12
	v := make([]byte, 1)

	ca.Set(string(k), v)
	ca.Get(string(k))
}