Merge branch 'ci/8.18' into 'master'

update to Coq 8.18

See merge request !32

.gitlab-ci.yml

@@ -28,10 +28,10 @@ variables:
 
 ## Build jobs
 
-build-coq.8.17.0:
+build-coq.8.18.0:
   <<: *template
   variables:
-    OPAM_PINS: "coq version 8.17.0"
+    OPAM_PINS: "coq version 8.18.0"
     DENY_WARNINGS: "1"
     MANGLE_NAMES: "1"
   tags:
@@ -40,7 +40,7 @@ build-coq.8.17.0:
 trigger-iris.timing:
   <<: *template
   variables:
-    OPAM_PINS: "coq version 8.17.0   git+https://gitlab.mpi-sws.org/$IRIS_REPO#$IRIS_REV"
+    OPAM_PINS: "coq version 8.18.0   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 8.17.0
+ - Coq 8.18.0
  - A development version of [Iris](https://gitlab.mpi-sws.org/iris/iris)
 
 ## Building from source

theories/lang/heap.v

@@ -91,7 +91,7 @@ Section to_heap.
   Implicit Types σ : state.
 
   Lemma to_heap_valid σ : ✓ to_heap σ.
-  Proof. intros l. rewrite lookup_fmap. case (σ !! l)=> [[[|n] v]|] //=. Qed.
+  Proof. intros l. rewrite lookup_fmap. destruct (σ !! l) as [[[|n] v]|] eqn:EQ; rewrite EQ //. Qed.
 
   Lemma lookup_to_heap_None σ l : σ !! l = None → to_heap σ !! l = None.
   Proof. by rewrite /to_heap lookup_fmap=> ->. Qed.