by soniakeys:

What steps will reproduce the problem?
1.  build with handy new gob/debug.go
2.  http://pastebin.com/f34911940

What is the expected output? What do you see instead?
Expected byte array encoded with predefined type id 5.
Instead, a 15 seems to have been generated somewhere.
Output:

new type id 14
        struct tsa
        id: 14
        field 0:        e1      id=15
type id 14
        7 bytes:        01 03 30 34 32 00
        field 0:
type id 15 not defined
2009/12/29 16:55:03 debug: field number out of range

What is your $GOOS?  $GOARCH?
linux amd64

Which revision are you using?  (hg identify)
719a3506aa5b+ tip

Please provide any additional information below.