[travjones]

I think it would produce a runtime error and return a stack trace. Someone more qualified than me should chime in though...

[justinsaccount]

Yes, like this:

  package main
  
  import "io"
  
  func main() {
  	var foo io.Closer
  	foo.Close()
  }
  justin@t420:/tmp$ go run nil.go 
  panic: runtime error: invalid memory address or nil pointer dereference
  [signal 0xb code=0x1 addr=0x20 pc=0x401023]
  
  goroutine 1 [running]:
  panic(0x463ea0, 0xc82000a140)
  	/usr/lib/go-1.6/src/runtime/panic.go:481 +0x3e6
  main.main()
  	/tmp/nil.go:7 +0x23
  exit status 2