fatal error when testing using race detector

[sredxny]

Hello, am having an issue while using this library with the race detector enabled.

the error message is: fatal error: checkptr: pointer arithmetic result points to invalid allocation

The issue is very easy to reproduce, just use the next code:

package gotiny

import (
	"github.com/niubaoshu/gotiny"
	"testing"
)

func TestGoTinyArray(t *testing.T){
	strings := []string{"1","2"}
	gotiny.Marshal(&strings)
}

Then execute the test with the race detector enabled:
go test -v -race -run TestGoTinyArray

go version: go1.16.14 darwin/amd64