vm-service: Include pauseEvent even when running without debugger support.

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 f82f25cf840fd4de4495c611c728f93eac61bc33..33301621a1ab4708483f3dddaa7ab7b7c5a170f8 100644
--- a/runtime/observatory/lib/src/service/object.dart
+++ b/runtime/observatory/lib/src/service/object.dart
@@ -1451,7 +1451,11 @@ class Isolate extends ServiceObjectOwner {
 
     updateHeapsFromMap(map['_heaps']);
     _updateBreakpoints(map['breakpoints']);
-    exceptionsPauseInfo = map['_debuggerSettings']['_exceptions'];
+    if (map['_debuggerSettings'] != null) {
+      exceptionsPauseInfo = map['_debuggerSettings']['_exceptions'];
+    } else {
+      exceptionsPauseInfo = "none";
+    }
 
     var newPauseEvent = map['pauseEvent'];
     assert((pauseEvent == null) ||