Issue 999: NPE from CompileTimeConstantAnalyzer

compiler/java/com/google/dart/compiler/resolver/CompileTimeConstantAnalyzer.java

Index: compiler/java/com/google/dart/compiler/resolver/CompileTimeConstantAnalyzer.java
diff --git a/compiler/java/com/google/dart/compiler/resolver/CompileTimeConstantAnalyzer.java b/compiler/java/com/google/dart/compiler/resolver/CompileTimeConstantAnalyzer.java
index 6a6e2953a5273d92ff9368623963c95fbd1ab9df..352be8eebd1639e05a1a81cb3632e39062b79c3c 100644
--- a/compiler/java/com/google/dart/compiler/resolver/CompileTimeConstantAnalyzer.java
+++ b/compiler/java/com/google/dart/compiler/resolver/CompileTimeConstantAnalyzer.java
@@ -129,16 +129,18 @@ public class CompileTimeConstantAnalyzer {
      * determined.
      */
     private Type getMostSpecificType(DartNode node) {
-      Element element = (Element) node.getSymbol();
-      Type type = inferredTypes.get(node);
-      if (type != null) {
-        return type;
-      }
-      if (element != null) {
-        type = element.getType();
+      if (node != null) {
+        Element element = (Element) node.getSymbol();
+        Type type = inferredTypes.get(node);
         if (type != null) {
           return type;
         }
+        if (element != null) {
+          type = element.getType();
+          if (type != null) {
+            return type;
+          }
+        }
       }
       return dynamicType;
     }