diff options
Diffstat (limited to 'plugins/derive/derive.ml')
| -rw-r--r-- | plugins/derive/derive.ml | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/plugins/derive/derive.ml b/plugins/derive/derive.ml index fb65a8639..c8c4c2dad 100644 --- a/plugins/derive/derive.ml +++ b/plugins/derive/derive.ml @@ -38,9 +38,8 @@ let start_deriving f suchthat lemma = let f_type = EConstr.Unsafe.to_constr f_type in let ef = EConstr.Unsafe.to_constr ef in let env' = Environ.push_named (LocalDef (f, ef, f_type)) env in - let evdref = ref sigma in - let suchthat = Constrintern.interp_type_evars env' evdref suchthat in - TCons ( env' , !evdref , suchthat , (fun sigma _ -> + let sigma, suchthat = Constrintern.interp_type_evars env' sigma suchthat in + TCons ( env' , sigma , suchthat , (fun sigma _ -> TNil sigma)))))) in |