jsonlz4: lz4: invalid source or destination buffer too short

[sck]

I tried using pierrec/lz4 to access mozilla's jsonlz4 files using the way outlined here: #28 , but it always shows this error:

lz4: invalid source or destination buffer too short

mozlz4a.py can decompress them without problems

Demo: https://go.dev/play/p/A32NWBYkchg

package main

import (
	"fmt"
	"crypto/md5"
	"github.com/pierrec/lz4"
)

// Payload created with this Python script: https://gist.github.com/Tblue/62ff47bef7f894e92ed5
//
// $ printf 'mozLz40\x00!\x00\x00\x00\xF0\x12{\"version\":[\"sessionrestore\",1]}\n'  | md5sum
// 12c5a86eaafe57bbb0345f52505610bf  -
// printf 'mozLz40\x00!\x00\x00\x00\xF0\x12{\"version\":[\"sessionrestore\",1]}\n'  | python3.7 mozlz4a.py  -d -
// {"version":["sessionrestore",1]}

func md5sum(s string) (r string) {
	digest := md5.New()
	digest.Write([]byte(s))
	return fmt.Sprintf("%x", digest.Sum(nil))
}

var payload string = "mozLz40\x00!\x00\x00\x00\xF0\x12{\"version\":[\"sessionrestore\",1]}\n"

func main() {
	fmt.Println(md5sum(payload))
	out := make([]byte, len(payload)*1000)
	_, e := lz4.UncompressBlock([]byte(payload), out)
	if e != nil {
		panic(e)
	}
	fmt.Print(string(out))
}

[sck]

I got it working now; I forgot to skip the header.

Playground: https://go.dev/play/p/Oj2-WFYLkYl

package main

import (
	"fmt"

	"crypto/md5"

	"github.com/pierrec/lz4"
)

// Payload created with this Python script: https://gist.github.com/Tblue/62ff47bef7f894e92ed5
//
// $ printf 'mozLz40\x00!\x00\x00\x00\xF0\x12{\"version\":[\"sessionrestore\",1]}\n'  | md5sum
// 12c5a86eaafe57bbb0345f52505610bf  -
// printf 'mozLz40\x00!\x00\x00\x00\xF0\x12{\"version\":[\"sessionrestore\",1]}\n'  | python3.7 mozlz4a.py  -d -
// {"version":["sessionrestore",1]}

func md5sum(s string) (r string) {
	digest := md5.New()
	digest.Write([]byte(s))
	return fmt.Sprintf("%x", digest.Sum(nil))
}

var payload string = "mozLz40\x00!\x00\x00\x00\xF0\x12{\"version\":[\"sessionrestore\",1]}\n"

func main() {
	fmt.Println(md5sum(payload))
	p := payload[12:len(payload)]
	out := make([]byte, len(payload)*1000)
	_, e := lz4.UncompressBlock([]byte(p), out)
	if e != nil {
		panic(e)
	}
	fmt.Print(string(out))
}