Fixes to get Swarm demo working again.

frog/value.dart

Index: frog/value.dart
diff --git a/frog/value.dart b/frog/value.dart
index 8c357ae85dd359a161d3c6117d02234c274a8e32..f58983f9385dd8662f7cc4981f767ef559359ae0 100644
--- a/frog/value.dart
+++ b/frog/value.dart
@@ -177,7 +177,11 @@ class Value {
     if (member == null && !isSuper && !isType) {
       member = context.findMembers(name);
       if (member == null && !isDynamic) {
-        world.warning('$name is not defined anywhere in the world.',
+        var where = 'the world';
+        if (name.startsWith('_')) {
+          where = 'library "${context.library.name}"';

[jimhug, 2011/12/14 19:00:57]

Nice message fix.

+        }
+        world.warning('$name is not defined anywhere in $where.',
            node.span);
       }
     }