by runningwild:

gob should be able to encode types that contain chans and functions, so long as those
fields are not exported.

-------------

package main

import (
  "encoding/gob"
  "bytes"
)

type Foo struct {
  A int
  b chan int
}

func main() {
  f := Foo{}
  var stream bytes.Buffer
  enc := gob.NewEncoder(&stream)
  err := enc.Encode(f)
  if err != nil {
    println(err.Error())
    return
  }
}

-------------

gob fails to encode in the above program with the error "gob: can't encode type
chan int".  Because gob isn't going to encode the field b anyway, because it is
unexported, the fact that it is a channel should not cause an error.

Compiler: 6g
OS: OSX 10.6.8
hg id: fb1cf5563774 tip