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-rw-r--r--pretyping/cases.ml2
1 files changed, 1 insertions, 1 deletions
diff --git a/pretyping/cases.ml b/pretyping/cases.ml
index 1819dc52..38355cf1 100644
--- a/pretyping/cases.ml
+++ b/pretyping/cases.ml
@@ -1763,7 +1763,7 @@ let prepare_predicate loc typing_fun sigma env tomatchs arsign tycon pred =
(* First strategy: we build an "inversion" predicate *)
let sigma1,pred1 = build_inversion_problem loc env sigma tomatchs t in
(* Second strategy: we directly use the evar as a non dependent pred *)
- let pred2 = lift (List.length arsign) t in
+ let pred2 = lift (List.length (List.flatten arsign)) t in
[sigma1, pred1; sigma, pred2]
(* Some type annotation *)
| Some rtntyp, _ ->