Remove NullPointerException.

sdk/lib/core/map.dart

Index: sdk/lib/core/map.dart
diff --git a/sdk/lib/core/map.dart b/sdk/lib/core/map.dart
index 58c9bf2f497463092bb8765ad8c58c5e00927e48..94964129ece50fea3bbffb306d2cbaa756760f79 100644
--- a/sdk/lib/core/map.dart
+++ b/sdk/lib/core/map.dart
@@ -189,7 +189,7 @@ class _HashMapImpl<K, V> implements HashMap<K, V> {
   }
 
   int _probeForAdding(K key) {
-    if (key == null) throw const NullPointerException();
+    if (key == null) throw new ArgumentError(null);

[ngeoffray, 2012/11/16 12:41:30]

new or const?

     int hash = _firstProbe(key.hashCode, _keys.length);
     int numberOfProbes = 1;
     int initialHash = hash;
@@ -224,7 +224,7 @@ class _HashMapImpl<K, V> implements HashMap<K, V> {
   }
 
   int _probeForLookup(K key) {
-    if (key == null) throw const NullPointerException();
+    if (key == null) throw const ArgumentError(null);

[ngeoffray, 2012/11/16 12:41:30]

new or const?

[Lasse Reichstein Nielsen, 2012/11/16 15:32:23]

Should be "new". There shouldn't even be a const constructor on ArgumentError,
so I'll check if this is the reason for some of the co19 errors.

     int hash = _firstProbe(key.hashCode, _keys.length);
     int numberOfProbes = 1;
     int initialHash = hash;