Change signature of noSuchMethod to take an InvocationMirror.

lib/core/errors.dart

Index: lib/core/errors.dart
diff --git a/lib/core/errors.dart b/lib/core/errors.dart
index c9709c9664d8ba3dd5bbb4cad99121e316190290..775924288ee69071c171afb35a9abd1fc3143a47 100644
--- a/lib/core/errors.dart
+++ b/lib/core/errors.dart
@@ -75,6 +75,7 @@ class NoSuchMethodError implements Error {
   final Object _receiver;
   final String _functionName;
   final List _arguments;
+  final Map<String,Dynamic> _namedArguments;
   final List _existingArgumentNames;
 
   /**
@@ -93,16 +94,31 @@ class NoSuchMethodError implements Error {
   const NoSuchMethodError(Object this._receiver,
                           String this._functionName,
                           List this._arguments,
+                          Map<String,Dynamic> this._namedArguments,
                           [List existingArgumentNames = null])
       : this._existingArgumentNames = existingArgumentNames;
 
   String toString() {
     StringBuffer sb = new StringBuffer();
-    for (int i = 0; i < _arguments.length; i++) {
-      if (i > 0) {
-        sb.add(", ");
+    int i = 0;
+    if (_arguments != null) {
+      for (; i < _arguments.length; i++) {
+        if (i > 0) {
+          sb.add(", ");
+        }
+        sb.add(safeToString(_arguments[i]));
       }
-      sb.add(safeToString(_arguments[i]));
+    }
+    if (_namedArguments != null) {
+      _namedArguments.forEach((String key, var value) {
+        if (i > 0) {
+          sb.add(", ");
+        }
+        sb.add(key);
+        sb.add(": ");
+        sb.add(safeToString(value));
+        i++;
+      });
     }
     if (_existingArgumentNames === null) {
       return "NoSuchMethodError : method not found: '$_functionName'\n"