bump to 8.20

.gitlab-ci.yml

@@ -28,10 +28,10 @@ variables:
 
 ## Build jobs
 
-build-coq.8.19.0:
+build-coq.8.20.0:
   <<: *template
   variables:
-    OPAM_PINS: "coq version 8.19.0"
+    OPAM_PINS: "coq version 8.20.0"
     DENY_WARNINGS: "1"
     MANGLE_NAMES: "1"
     # Mostly to make the lifetime logic available
@@ -42,7 +42,7 @@ build-coq.8.19.0:
 trigger-iris.timing:
   <<: *template
   variables:
-    OPAM_PINS: "coq version 8.19.0   git+https://gitlab.mpi-sws.org/$IRIS_REPO#$IRIS_REV"
+    OPAM_PINS: "coq version 8.20.0   git+https://gitlab.mpi-sws.org/$IRIS_REPO#$IRIS_REV"
   tags:
   - fp-timing
   only:

README.md

@@ -6,7 +6,7 @@ This is the Coq development accompanying lambda-Rust.
 
 This version is known to compile with:
 
- - Coq 8.19.0
+ - Coq 8.20.0
  - A development version of [Iris](https://gitlab.mpi-sws.org/iris/iris)
 
 ## Building from source

lambda-rust/lang/heap.v

@@ -235,7 +235,7 @@ Section heap.
       rewrite -[vl1](firstn_skipn ll) -[vl2](firstn_skipn ll) 2!heap_pointsto_vec_app.
       iDestruct "Hown1" as "[Hown1 _]". iDestruct "Hown2" as "[Hown2 _]".
       iCombine "Hown1" "Hown2" as "Hown". rewrite heap_pointsto_vec_op; last first.
-      { rewrite !firstn_length. subst ll.
+      { rewrite !length_firstn. subst ll.
         rewrite -!Nat.min_assoc Nat.min_idempotent Nat.min_comm -Nat.min_assoc Nat.min_idempotent Nat.min_comm. done. }
       iDestruct "Hown" as "[H Hown]". iDestruct "H" as %Hl. iExists (take ll vl1). iFrame.
       destruct (Nat.min_spec (length vl1) (length vl2)) as [[Hne Heq]|[Hne Heq]].