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-rw-r--r--common/Events.v2
1 files changed, 1 insertions, 1 deletions
diff --git a/common/Events.v b/common/Events.v
index 022adaef..28bb992a 100644
--- a/common/Events.v
+++ b/common/Events.v
@@ -1150,7 +1150,7 @@ Proof.
- assert (t1 = t2) by (inv H; inv H0; auto). subst t2.
exists vres1; exists m1; auto.
(* determ *)
-- inv H; inv H0; try (unfold Vnullptr in *; discriminate).
+- inv H; inv H0; try (unfold Vnullptr in *; destruct Archi.ptr64; discriminate).
+ assert (EQ1: Vptrofs sz0 = Vptrofs sz) by congruence.
assert (EQ2: sz0 = sz).
{ unfold Vptrofs in EQ1; destruct Archi.ptr64 eqn:SF.