Bolt #299

bolt_299.go

package main

import (
	"log"
	"os"

	"github.com/boltdb/bolt"
)

var path = "bolt.db"

func main() {
	os.Remove(path)

	var val []byte

	// 255.996055603 MiB ... no problem
	val = make([]byte, 268431320)
	writeKey("testkey", val)

	// 255.9960565567 MiB ... panic
	val = make([]byte, 268431321)
	writeKey("testkey", val)

}

func writeKey(key string, val []byte) {
	db, err := bolt.Open(path, 0600, nil)
	defer db.Close()
	if err != nil {
		log.Fatal(err)
	}

	err = db.Update(func(tx *bolt.Tx) error {
		bucket, _ := tx.CreateBucketIfNotExists([]byte("testbucket"))
		err := bucket.Put([]byte(key), val)
		if err != nil {
			return err
		}
		return nil
	})

	if err != nil {
		log.Fatal(err)
	}
}