Use [notypeclasses refine] instead of eapply in iLöb and iNext, to workaround...
Use [notypeclasses refine] instead of eapply in iLöb and iNext, to workaround the confusion of apply wrt canonical structures.
...  @@ 899,7 +899,10 @@ Tactic Notation "iNext" open_constr(n) :=  ...  @@ 899,7 +899,10 @@ Tactic Notation "iNext" open_constr(n) := 
iStartProof;  iStartProof;  
let P := match goal with  envs_entails _ ?P => P end in  let P := match goal with  envs_entails _ ?P => P end in  
try lazymatch n with 0 => fail 1 "iNext: cannot strip 0 laters" end;  try lazymatch n with 0 => fail 1 "iNext: cannot strip 0 laters" end;  
eapply (tac_next _ _ n);  (* apply is sometimes confused wrt. canonical structures search.  
refine should us the other unification algorithm, which should  
not have this issue. *)  
notypeclasses refine (coq_tactics.tac_next _ _ n _ _ _ _ _);  


[apply _  fail "iNext:" P "does not contain" n "laters"  [apply _  fail "iNext:" P "does not contain" n "laters"  
lazymatch goal with  lazymatch goal with  
  IntoLaterNEnvs 0 _ _ => fail "iNext:" P "does not contain laters"    IntoLaterNEnvs 0 _ _ => fail "iNext:" P "does not contain laters"  
...  @@ 1558,7 +1561,10 @@ Tactic Notation "iInduction" constr(x) "as" simple_intropattern(pat) constr(IH)  ...  @@ 1558,7 +1561,10 @@ Tactic Notation "iInduction" constr(x) "as" simple_intropattern(pat) constr(IH) 
(** * Löb Induction *)  (** * Löb Induction *)  
Tactic Notation "iLöbCore" "as" constr (IH) :=  Tactic Notation "iLöbCore" "as" constr (IH) :=  
iStartProof;  iStartProof;  
eapply tac_löb with _ IH;  (* apply is sometimes confused wrt. canonical structures search.  
refine should us the other unification algorithm, which should  


not have this issue. *)  
notypeclasses refine (tac_löb _ _ IH _ _ _ _);  
[reflexivity  fail "iLöb: spatial context not empty, this should not happen"  [reflexivity  fail "iLöb: spatial context not empty, this should not happen"  
env_reflexivity  fail "iLöb:" IH "not fresh"].  env_reflexivity  fail "iLöb:" IH "not fresh"].  
...  ... 