diff -d -u -r1.1.1.2 app_dial.c
--- apps/app_dial.c	26 Mar 2008 13:55:03 -0000	1.1.1.2
+++ apps/app_dial.c	18 Nov 2008 16:18:24 -0000
@@ -559,6 +563,16 @@
 				ast_hangup(winner);
 				continue;
 			}
+#if 1 /* For testing only! */
+			/* This makes it much more likely that the SIP-loop mis-detection bug
+			 * manifests itself (re-INVITE is received by us before the channel is UP
+			 * because the ANSWER control frame was not read here yet). */
+			if (winner != in) {
+				/* 200 µs is not enough to trigger it every time
+				 * (Core 2 quad @ 2.6MHz) */
+				usleep(300);
+			}
+#endif
 			f = ast_read(winner);
 			if (!f) {
 				in->hangupcause = c->hangupcause;