According to http://hydra.nixos.org/build/639441/download/1/manual/chunk-chapter/library-lists.html the fetch strategy should work like this (in stratego-shell):

stratego> <fetch(?2)> [1,2,3]
2

However when I try it here (using stratego-shell 0.7pre0) I get:

stratego> <fetch(?2)> [1,2,3]
[1,2,3]

Are the docs wrong, is stratego(-shell) wrong, or am I doing something wrong?

Before I can use fetch I import it using:

import libstratego-lib

Submitted by Tobi Vollebregt on 27 September 2010 at 21:00

The documentation is wrong. The behaviour you want is provided by fetch-elem.

The documentation is wrong. You get the result you want with fetch-elem. (Look at the definition of fetch for the definitive answer.)

Fixed in r. 21260 of the manual