Invalid memory address or nil pointer dereference

[KasperTidemann]

I'm trying to get the library to connect to a Gmail server using some of the example code provided at http://godoc.org/github.com/mxk/go-imap/imap. I've stripped out all unnecessary code in order to just connect to a server. This is my example code:

package main

import "code.google.com/p/go-imap/go1/imap"
import "fmt"

func main() {
  client, _ := imap.Dial("imap.gmail.com")

  fmt.Println("Server says hello:", client.Data[0].Info)

  if client.State() == imap.Login {
    client.Login("<example e-mail>", "<example password>")
  }
}

For the sake of clarity and isolating the problem, I've removed the deferring of the logout and so on. Running the above code results in this error:

panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xb code=0x1 addr=0x0 pc=0x21bc]

goroutine 16 [running]:
runtime.panic(0x22adc0, 0x3a24a4)
    /usr/local/Cellar/go/1.3.1/libexec/src/pkg/runtime/panic.c:279 +0xf5
main.main()
    /Users/kasper/go/src/test/imap.go:9 +0x1bc

goroutine 19 [finalizer wait]:
runtime.park(0x145d0, 0x3a5a60, 0x3a4569)
    /usr/local/Cellar/go/1.3.1/libexec/src/pkg/runtime/proc.c:1369 +0x89
runtime.parkunlock(0x3a5a60, 0x3a4569)
    /usr/local/Cellar/go/1.3.1/libexec/src/pkg/runtime/proc.c:1385 +0x3b
runfinq()
    /usr/local/Cellar/go/1.3.1/libexec/src/pkg/runtime/mgc0.c:2644 +0xcf
runtime.goexit()
    /usr/local/Cellar/go/1.3.1/libexec/src/pkg/runtime/proc.c:1445

goroutine 17 [syscall]:
runtime.goexit()
    /usr/local/Cellar/go/1.3.1/libexec/src/pkg/runtime/proc.c:1445
exit status 2

I've seen this problem referenced elsewhere, but I've been unable to find a solution. Any suggestions as to what might be wrong?

[mxk]

imap.Dial is returning an error and a nil client. The error should tell you what went wrong (probably the missing port number resulting in a failed connection).

[KasperTidemann]

You're right - thanks! Sorry for the confusion.