update Iris

opam

@@ -9,6 +9,6 @@ build: [make "-j%{jobs}%"]
 install: [make "install"]
 remove: ["rm" "-rf" "%{lib}%/coq/user-contrib/reloc"]
 depends: [
-  "coq-iris-heap-lang" { (= "dev.2020-11-13.1.9c531d57") | (= "dev") }
+  "coq-iris-heap-lang" { (= "dev.2020-11-26.2.03b317f4") | (= "dev") }
   "coq-autosubst" { = "dev.coq86" }
 ]

theories/logic/rules.v

@@ -13,6 +13,8 @@ Section rules.
   Implicit Types e t : expr.
   Implicit Types v w : val.
 
+  Local Existing Instance pure_exec_fill.
+
   (** * Primitive rules *)
 
   (** ([fupd_refines] is defined in [logrel_binary.v]) *)