From f99997cf5f7818a613d3fe680d22936cb77fc3ee Mon Sep 17 00:00:00 2001
From: Tobiasz Cudnik <tobiasz.cudnik@gmail.com>
Date: Sun, 11 Mar 2012 22:56:26 +0100
Subject: [PATCH] Added stack trace to optional argument error. (cherry picked
 from commit 833c657)

---
 src/contracts.coffee | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/contracts.coffee b/src/contracts.coffee
index ce951fb..7ed1d7d 100644
--- a/src/contracts.coffee
+++ b/src/contracts.coffee
@@ -256,7 +256,8 @@ fun = (dom, rng, options) ->
         true
       else
         if prevWasOpt
-          throw new Error "Illagal arguments: required argument following an optional argument."
+          throw new Error "Illagal arguments: required argument following an" +
+            "optional argument. #{curr}"
         else
           false
     ), false