Update to latest Iris.

This fixes issue #1.

opam

@@ -9,5 +9,5 @@ build: [make "-j%{jobs}%"]
 install: [make "install"]
 remove: ["rm" "-rf" "%{lib}%/coq/user-contrib/iris_examples"]
 depends: [
-  "coq-iris" { (= "dev.2017-10-19.0") | (= "dev") }
+  "coq-iris" { (= "dev.2017-10-28.0") | (= "dev") }
 ]

theories/barrier/proof.v

@@ -49,7 +49,7 @@ Definition recv (l : loc) (R : iProp Σ) : iProp Σ :=
     saved_prop_own i Q ∗ ▷ (Q -∗ R))%I.
 
 Global Instance barrier_ctx_persistent (γ : gname) (l : loc) (P : iProp Σ) :
-  PersistentP (barrier_ctx γ l P).
+  Persistent (barrier_ctx γ l P).
 Proof. apply _. Qed.
 
 (** Setoids *)

theories/barrier/protocol.v

@@ -24,7 +24,7 @@ Definition tok (s : state) : set token :=
   (if state_phase s is High then {[ Send ]} else ∅).
 Global Arguments tok !_ /.
 
-Canonical Structure sts := sts.STS prim_step tok.
+Canonical Structure sts := sts.Sts prim_step tok.
 
 (* The set of states containing some particular i *)
 Definition i_states (i : gname) : set state := {[ s | i ∈ state_I s ]}.