invalid memory address or nil pointer dereference

[webkonglong]

package main

import (
	"log"

	"github.com/wangbin/jiebago"
)
var seg jiebago.Segmenter
func main() {
	log.Println(seg.CutAll("我来到北京清华大学"))
}

panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xc0000005 code=0x1 addr=0x28 pc=0x4bcf13]

goroutine 4 [running]:
sync.(*RWMutex).RLock(...)
        C:/Go/src/sync/rwmutex.go:48
github.com/wangbin/jiebago.(*Dictionary).Frequency(0x0, 0xc0001c5dd8, 0x3, 0x20, 0xc0001c5dd8)
        C:/Users/amz/Desktop/gotest/src/github.com/wangbin/jiebago/dictionary.go:54 +0x33
github.com/wangbin/jiebago.(*Segmenter).dag(0x625688, 0xc0001c5ea0, 0x9, 0x20, 0x9)
        C:/Users/amz/Desktop/gotest/src/github.com/wangbin/jiebago/jieba.go:118 +0xbe
github.com/wangbin/jiebago.(*Segmenter).cutAll.func1(0x4fe190, 0x1b, 0x625688, 0xc000010060)
        C:/Users/amz/Desktop/gotest/src/github.com/wangbin/jiebago/jieba.go:303 +0x9d
created by github.com/wangbin/jiebago.(*Segmenter).cutAll
        C:/Users/amz/Desktop/gotest/src/github.com/wangbin/jiebago/jieba.go:301 +0x86
exit status 

[leexuehan]

package main

import (
	"log"

	"github.com/wangbin/jiebago"
)
var seg jiebago.Segmenter
func main() {
	log.Println(seg.CutAll("我来到北京清华大学"))
}

panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xc0000005 code=0x1 addr=0x28 pc=0x4bcf13]

goroutine 4 [running]:
sync.(*RWMutex).RLock(...)
        C:/Go/src/sync/rwmutex.go:48
github.com/wangbin/jiebago.(*Dictionary).Frequency(0x0, 0xc0001c5dd8, 0x3, 0x20, 0xc0001c5dd8)
        C:/Users/amz/Desktop/gotest/src/github.com/wangbin/jiebago/dictionary.go:54 +0x33
github.com/wangbin/jiebago.(*Segmenter).dag(0x625688, 0xc0001c5ea0, 0x9, 0x20, 0x9)
        C:/Users/amz/Desktop/gotest/src/github.com/wangbin/jiebago/jieba.go:118 +0xbe
github.com/wangbin/jiebago.(*Segmenter).cutAll.func1(0x4fe190, 0x1b, 0x625688, 0xc000010060)
        C:/Users/amz/Desktop/gotest/src/github.com/wangbin/jiebago/jieba.go:303 +0x9d
created by github.com/wangbin/jiebago.(*Segmenter).cutAll
        C:/Users/amz/Desktop/gotest/src/github.com/wangbin/jiebago/jieba.go:301 +0x86
exit status 

Maybe you need to load dictionary to init seg first.