Fix code display in Observatory

runtime/observatory/lib/src/service/object.dart

Index: runtime/observatory/lib/src/service/object.dart
diff --git a/runtime/observatory/lib/src/service/object.dart b/runtime/observatory/lib/src/service/object.dart
index 75c09182de503bbd483c0b534dea51e712d0472b..cca39822bc58e22b7b7f1df14ec2786e13d9a39b 100644
--- a/runtime/observatory/lib/src/service/object.dart
+++ b/runtime/observatory/lib/src/service/object.dart
@@ -2819,7 +2819,8 @@ class Code extends ServiceObject {
     if (function == null) {
       return;
     }
-    if (function.location.script == null) {
+    if ((function.location == null) ||
+        (function.location.script == null)) {
       // Attempt to load the function.
       function.load().then((func) {
         var script = function.location.script;