Merge "Fix NPE when trying to access task before AppWindowToken attach to one"
diff --git a/services/core/java/com/android/server/wm/ActivityRecord.java b/services/core/java/com/android/server/wm/ActivityRecord.java
index 88dd3c6..54e3dee 100644
--- a/services/core/java/com/android/server/wm/ActivityRecord.java
+++ b/services/core/java/com/android/server/wm/ActivityRecord.java
@@ -1089,6 +1089,12 @@
             Slog.w(TAG_WM, "Attempted to set icon of non-existing app token: " + appToken);
             return false;
         }
+        if (mAppWindowToken.getTask() == null) {
+            // Can be removed after unification of Task and TaskRecord.
+            Slog.w(TAG_WM, "Attempted to start a window to an app token not having attached to any"
+                    + " task: " + appToken);
+            return false;
+        }
         return mAppWindowToken.addStartingWindow(pkg, theme, compatInfo, nonLocalizedLabel,
                 labelRes, icon, logo, windowFlags, transferFrom, newTask, taskSwitch,
                 processRunning, allowTaskSnapshot, activityCreated, fromRecents);