diff options
Diffstat (limited to 'library')
| -rw-r--r-- | library/heads.ml | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/library/heads.ml b/library/heads.ml index 8fda452c1..813031558 100644 --- a/library/heads.ml +++ b/library/heads.ml @@ -80,7 +80,9 @@ let kind_of_head env t = match pi2 (lookup_named id env) with | Some c -> aux k l c b | None -> NotImmediatelyComputableHead) - | Const cst -> on_subterm k l b (constant_head cst) + | Const cst -> + (try on_subterm k l b (constant_head cst) + with Not_found -> assert false) | Construct _ | CoFix _ -> if b then NotImmediatelyComputableHead else ConstructorHead | Sort _ | Ind _ | Prod _ -> RigidHead RigidType |