Concurrent data generation (thread safety) about faker HOT 6 CLOSED

panic: runtime error: index out of range

goroutine 6 [running]:
math/rand.(*rngSource).Uint64(...)
        /Users/<username>/.gvm/gos/go1.9.4/src/math/rand/rng.go:246
math/rand.(*rngSource).Int63(0xc420083500, 0x4519710ecadc72e8)
        /Users/<username>.gvm/gos/go1.9.4/src/math/rand/rng.go:231 +0x8a
github.com/bxcodec/faker.randomString(0x19, 0x18, 0xc420083500)
        /Users/r<username>/go/src/github.com/bxcodec/faker/faker.go:299 +0x10c
github.com/bxcodec/faker.getValue(0x1178c40, 0x10c7780, 0x10c7780, 0xc420010360, 0x16, 0x98, 0x0)
        /Users/<username>/go/src/github.com/bxcodec/faker/faker.go:182 +0x1710
github.com/bxcodec/faker.FakeData(0x10c3f40, 0xc420010360, 0x0, 0x0)
        /Users/ <username>/go/src/github.com/bxcodec/faker/faker.go:131 +0x1d6
main.main.func1(0xc42001a2a0, 0xc420010360)
        /Users/<username>/testarea/test.go:21 +0x6a
created by main.main
        /Users/<username>/testarea/test.go:17 +0x9c
exit status 2

package main

import (
	"sync"

	"github.com/bxcodec/faker"
)

func main() {
	var wg sync.WaitGroup
	for i := 0; i < 40; i++ {
		wg.Add(1)
		go func() {
			defer wg.Done()

                         // Need a fixed number of strings in an array
			var name string 
			lst := make([]string, 0, 1000)

			for x := 0; x < 1000; x++ {
				faker.FakeData(&name)

				lst = append(lst, name)
			}
		}()
	}

	wg.Wait()

	return
}