| (g, t, k, tag) :: s ->
match init_pos g with (* TODO *)
| [] -> fail (lazy "empty goals")
- | [_] when (not force) -> fail (lazy "too few goals to branch")
+ | [_] when (not force) -> fail (lazy "too few goals to branch")
| loc :: loc_tl ->
([ loc ], [], [], `BranchTag) :: (loc_tl, t, k, tag) :: s
in