恐慌：运行时错误：无效的内存地址或零指针取消引用

Question

我目前正在使用用于 Go 的 Soundcloud 包装器，我想打印用户的关注者，但这是我第一次遇到指针问题。

构建错误后

panic: runtime error: invalid memory address or nil pointer dereference

[signal 0xb code=0x1 addr=0x10 pc=0xc9c26]

代码

package main

import (

    "fmt"

    "github.com/njasm/gosoundcloud"

)

func main() {

    //  callback url is optional - nil in example

    s, _ := gosoundcloud.NewSoundcloudApi("Client_Id", "Client_Secret", nil)

    var userID uint64 = 1

    member, err := s.GetUser(userID)

    if err != nil {

               panic(err)

     }

    fmt.Println(member.Followers)

}

建成后

goroutine 1 [running]:

panic(0x3508c0, 0xc82000a0b0)

    /usr/local/go/src/runtime/panic.go:481 +0x3e6

net/http.(*Client).doFollowingRedirects(0x0, 0xc8200d0000, 0x4611c8, 0x0, 0x0, 0x0)

    /usr/local/go/src/net/http/client.go:429 +0x66

net/http.(*Client).Do(0x0, 0xc8200d0000, 0x8, 0x0, 0x0)

    /usr/local/go/src/net/http/client.go:188 +0xff

github.com/njasm/gosoundcloud.(*SoundcloudApi).do(0xc8200c8720, 0xc8200d0000, 0xc820012f00, 0x0, 0x0)

    /Users/ManuelDao/Documents/GoBot/src/github.com/njasm/gosoundcloud/soundcloud.go:217 +0x4b

github.com/njasm/gosoundcloud.(*SoundcloudApi).Get(0xc8200c8720, 0xc820012f00, 0x22, 0x0, 0x1, 0x0, 0x0)

    /Users/ManuelDao/Documents/GoBot/src/github.com/njasm/gosoundcloud/soundcloud.go:92 +0xe1

github.com/njasm/gosoundcloud.(*SoundcloudApi).GetUser(0xc8200c8720, 0x1, 0x417a80, 0x0, 0x0)

        /Users/ManuelDao/Documents/GoBot/src/github.com/njasm/gosoundcloud/soundcloud.go:276 +0xc6

main.main()

        /Users/ManuelDao/Documents/GoBot/src/GoBot/GoBot.go:24 +0x70

exit status 2

Answer 1

我以前从未使用过这个库，但看起来你忘记了自己的身份验证。s, _ := gosoundcloud.NewSoundcloudApi("Client_Id", "Client_Secret", nil)if err = s.PasswordCredentialsToken("[e-mail]", "your_password"); err != nil {    // handle err}可能是这样的？