[econstr] Continue consolidation of EConstr API under `interp`.

This commit was motivated by true spurious conversions arising in my
`to_constr` debug branch.

The changes here need careful review as the tradeoffs are subtle and
still a lot of clean up remains to be done in `vernac/*`.

We have opted for penalize [minimally] the few users coming from true
`Constr`-land, but I am sure we can tweak code in a much better way.

In particular, it is not clear if internalization should take an
`evar_map` even in the cases where it is not triggered, see the
changes under `plugins` for a good example.

Also, the new return type of `Pretyping.understand` should undergo
careful review.

We don't touch `Impargs` as it is not clear how to proceed, however,
the current type of `compute_implicits_gen` looks very suspicious as
it is called often with free evars.

Some TODOs are:

- impargs was calling whd_all, the Econstr equivalent can be either
  + Reductionops.whd_all [which does refolding and no sharing]
  + Reductionops.clos_whd_flags with all as a flag.

1 files changed, 1 insertions, 1 deletions

diff --git a/plugins/ssr/ssrcommon.ml b/plugins/ssr/ssrcommon.ml
index 4ae746288..1a02fb91c 100644
--- a/plugins/ssr/ssrcommon.ml
+++ b/plugins/ssr/ssrcommon.ml
@@ -203,7 +203,7 @@ let glob_constr ist genv = function
     let vars = Id.Map.fold (fun x _ accu -> Id.Set.add x accu) ist.Tacinterp.lfun Id.Set.empty in
     let ltacvars = {
       Constrintern.empty_ltac_sign with Constrintern.ltac_vars = vars } in
-    Constrintern.intern_gen Pretyping.WithoutTypeConstraint ~ltacvars genv ce
+    Constrintern.intern_gen Pretyping.WithoutTypeConstraint ~ltacvars genv Evd.(from_env genv) ce
   | rc, None -> rc
 
 let pf_intern_term ist gl (_, c) = glob_constr ist (pf_env gl) c