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350f5ecf · Simon Hudon · 4e15875a · 350f5ecf
Commit 350f5ecf authored 3 years ago by Simon Hudon
--- a/iris_heap_lang/derived_laws.v
+++ b/iris_heap_lang/derived_laws.v
@@ -206,7 +206,7 @@ Proof.
 Qed.

 Lemma twp_xchg_offset s E l off vs v v' :
-  (vs !! off) = Some v →
+  vs !! off = Some v →
  val_is_unboxed v ->
  [[{ l ↦∗ vs }]] Xchg #(l +ₗ off) v' @ s; E [[{ RET v; l ↦∗ <[off:=v']> vs }]].
 Proof.