diff --git a/core/java/android/app/AlarmManager.java b/core/java/android/app/AlarmManager.java
index 92fbd59..676bace 100644
--- a/core/java/android/app/AlarmManager.java
+++ b/core/java/android/app/AlarmManager.java
@@ -29,7 +29,6 @@
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.os.RemoteException;
-import android.os.UserHandle;
 import android.os.WorkSource;
 import android.text.TextUtils;
 import android.util.ArrayMap;
@@ -1150,7 +1149,9 @@
         public void writeToProto(ProtoOutputStream proto, long fieldId) {
             final long token = proto.start(fieldId);
             proto.write(AlarmClockInfoProto.TRIGGER_TIME_MS, mTriggerTime);
-            mShowIntent.writeToProto(proto, AlarmClockInfoProto.SHOW_INTENT);
+            if (mShowIntent != null) {
+                mShowIntent.writeToProto(proto, AlarmClockInfoProto.SHOW_INTENT);
+            }
             proto.end(token);
         }
     }
diff --git a/core/java/android/content/res/Configuration.java b/core/java/android/content/res/Configuration.java
index f7aea97..57ec178 100644
--- a/core/java/android/content/res/Configuration.java
+++ b/core/java/android/content/res/Configuration.java
@@ -1096,7 +1096,9 @@
         protoOutputStream.write(FONT_SCALE, fontScale);
         protoOutputStream.write(MCC, mcc);
         protoOutputStream.write(MNC, mnc);
-        mLocaleList.writeToProto(protoOutputStream, LOCALES);
+        if (mLocaleList != null) {
+            mLocaleList.writeToProto(protoOutputStream, LOCALES);
+        }
         protoOutputStream.write(SCREEN_LAYOUT, screenLayout);
         protoOutputStream.write(COLOR_MODE, colorMode);
         protoOutputStream.write(TOUCHSCREEN, touchscreen);
@@ -1111,7 +1113,9 @@
         protoOutputStream.write(SCREEN_HEIGHT_DP, screenHeightDp);
         protoOutputStream.write(SMALLEST_SCREEN_WIDTH_DP, smallestScreenWidthDp);
         protoOutputStream.write(DENSITY_DPI, densityDpi);
-        windowConfiguration.writeToProto(protoOutputStream, WINDOW_CONFIGURATION);
+        if (windowConfiguration != null) {
+            windowConfiguration.writeToProto(protoOutputStream, WINDOW_CONFIGURATION);
+        }
         protoOutputStream.end(token);
     }
 
diff --git a/core/java/android/os/Looper.java b/core/java/android/os/Looper.java
index f17e0f0..684a8ee 100644
--- a/core/java/android/os/Looper.java
+++ b/core/java/android/os/Looper.java
@@ -386,7 +386,9 @@
         final long looperToken = proto.start(fieldId);
         proto.write(LooperProto.THREAD_NAME, mThread.getName());
         proto.write(LooperProto.THREAD_ID, mThread.getId());
-        mQueue.writeToProto(proto, LooperProto.QUEUE);
+        if (mQueue != null) {
+            mQueue.writeToProto(proto, LooperProto.QUEUE);
+        }
         proto.end(looperToken);
     }