From d9b7adf77a0b3e7bfb14d1f0ec2a3b2220eb4827 Mon Sep 17 00:00:00 2001
From: Peter Ferrie <peter.ferrie@gmail.com>
Date: Thu, 10 Oct 2019 13:32:47 -0700
Subject: [PATCH] guard against an unlikely event

---
 src/ui.wait.a | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/ui.wait.a b/src/ui.wait.a
index 5a8a3dbed..f1e5d95da 100644
--- a/src/ui.wait.a
+++ b/src/ui.wait.a
@@ -84,3 +84,6 @@ CoverFade
          !word $6000
          jsr   $6000                 ; call transition effect
          jmp   MegaAttractMode       ; exit via mega attract mode
+!if (RELBASE != $2000) and (>WaitForKeyFor30Seconds != >*) {
+  !error "WaitForKeyFor30Seconds crossed a page (", WaitForKeyFor30Seconds, " to ", *
+}