you can case even if only a right appears... so, substituting them for metas is wrong...

diff --git a/helm/software/components/tactics/primitiveTactics.ml b/helm/software/components/tactics/primitiveTactics.ml
index 5310fea7e09a6638bb7b5181053748ac3fba0160..8787b1a73c048e6b523ccf75dc85906509d64746 100644 (file)
--- a/helm/software/components/tactics/primitiveTactics.ml
+++ b/helm/software/components/tactics/primitiveTactics.ml
@@ -711,7 +711,7 @@ let cases_intros_tac ?(mk_fresh_name_callback = FreshNamesGenerator.mk_fresh_nam
         let rec mkargs = function 
           | 0 -> []
           | 1 -> [Cic.Rel 1]
-          | n -> (Cic.Implicit None)::(mkargs (n-1)) 
+          | n -> (Cic.Rel n)::(mkargs (n-1)) 
         in
         mkargs n_lambdas 
       in