From b1995fce130aff8ec6c72ddb170a9213fb5f8158 Mon Sep 17 00:00:00 2001
From: David Greenspan <dgreenspan@alum.mit.edu>
Date: Wed, 7 Jan 2015 17:50:37 -0800
Subject: [PATCH] =?UTF-8?q?Improve=20a=20=E2=80=9Cmatch=E2=80=9D=20error?=
 =?UTF-8?q?=20message?=
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---
 packages/check/match.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/packages/check/match.js b/packages/check/match.js
index 9b15b8e6a7..b80194f71d 100644
--- a/packages/check/match.js
+++ b/packages/check/match.js
@@ -249,8 +249,8 @@ var checkSubtree = function (value, pattern) {
   if (pattern instanceof Function) {
     if (value instanceof pattern)
       return;
-    // XXX what if .name isn't defined
-    throw new Match.Error("Expected " + pattern.name);
+    throw new Match.Error("Expected " + (pattern.name ||
+                                         "particular constructor"));
   }
 
   var unknownKeysAllowed = false;