Require Import Int31 Cyclic31. Open Scope int31_scope. (* This used to go through because of an unbalanced stack bug in the bytecode interpreter *) Lemma bad : False. assert (1 = 2). change 1 with (add31 (addmuldiv31 65 (add31 1 1) 2) 1). Fail vm_compute; reflexivity. (* discriminate. Qed. *) Abort.