From 6867ed212b4c941bbdfc2ab40391b79ac04c14c5 Mon Sep 17 00:00:00 2001
From: Rado Kirov <radokirov@google.com>
Date: Thu, 14 May 2015 22:04:47 -0700
Subject: [PATCH] fix(binder): adds more explicit error message thrown.

---
 lib/core_dom/element_binder_builder.dart | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/core_dom/element_binder_builder.dart b/lib/core_dom/element_binder_builder.dart
index 005fe901b..88713aada 100644
--- a/lib/core_dom/element_binder_builder.dart
+++ b/lib/core_dom/element_binder_builder.dart
@@ -93,7 +93,8 @@ class ElementBinderBuilder {
     if (annotation.map != null) {
       annotation.map.forEach((attrName, mapping) {
         if (mapping == null) {
-          throw "Null mapping value for '${attrName}' on annotation with selector '${annotation.selector}'.";
+          throw "Null mapping value for '${attrName}' on annotation with "
+              "selector '${annotation.selector}' with map '${annotation.map}'.";
         }
         Match match = _MAPPING.firstMatch(mapping);
         if (match == null) {