From 6f21190383b96735a2fdcbdac44d9e33ff1aee05 Mon Sep 17 00:00:00 2001
From: Tony Garnock-Jones <tonygarnockjones@gmail.com>
Date: Mon, 26 May 2014 13:44:15 -0400
Subject: [PATCH] Matched values may not be JSONable, but must be matchable
 with __

---
 route.js | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/route.js b/route.js
index 6452123..8630096 100644
--- a/route.js
+++ b/route.js
@@ -613,7 +613,13 @@ function Routing(exports) {
 		    r = r.get(__);
 		}
 	    } else {
-		var key = JSON.stringify(v);
+		var key;
+		try {
+		    key = JSON.stringify(v);
+		} catch (exn) {
+		    // For example, v might be cyclic, as in DOM events.
+		    key = null;
+		}
 		if (key in r.entries) {
 		    r = r.get(key);
 		} else {