Fixed bug where onComplete would throw an error if onError was called before

app/src/main/java/acr/browser/lightning/activity/ReadingActivity.java

@@ -13,6 +13,7 @@ import android.support.annotation.Nullable;
 import android.support.v7.app.AlertDialog;
 import android.support.v7.app.AppCompatActivity;
 import android.support.v7.widget.Toolbar;
+import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.Menu;
 import android.view.MenuItem;
@@ -42,6 +43,8 @@ import butterknife.ButterKnife;
 
 public class ReadingActivity extends AppCompatActivity {
 
+    private static final String TAG = ReadingActivity.class.getSimpleName();
+
     @Bind(R.id.textViewTitle)
     TextView mTitle;
 
@@ -197,11 +200,11 @@ public class ReadingActivity extends AppCompatActivity {
                     subscriber.onNext(new ReaderInfo(result.getTitle(), result.getText()));
                 } catch (Exception e) {
                     subscriber.onError(new Throwable("Encountered exception"));
-                    e.printStackTrace();
+                    Log.e(TAG, "Error parsing page", e);
                 } catch (OutOfMemoryError e) {
                     System.gc();
                     subscriber.onError(new Throwable("Out of memory"));
-                    e.printStackTrace();
+                    Log.e(TAG, "Out of memory", e);
                 }
                 subscriber.onComplete();
             }

app/src/main/java/acr/browser/lightning/react/Observable.java

@@ -146,6 +146,7 @@ public class Observable<T> {
         @Nullable private volatile OnSubscribe<T> mOnSubscribe;
         @NonNull private final Observable<T> mObservable;
         private boolean mOnCompleteExecuted = false;
+        private boolean mOnError = false;
 
         public SubscriberImpl(@NonNull OnSubscribe<T> onSubscribe, @NonNull Observable<T> observable) {
             mOnSubscribe = onSubscribe;
@@ -160,10 +161,10 @@ public class Observable<T> {
         @Override
         public void onComplete() {
             OnSubscribe<T> onSubscribe = mOnSubscribe;
-            if (!mOnCompleteExecuted && onSubscribe != null) {
+            if (!mOnCompleteExecuted && onSubscribe != null && !mOnError) {
                 mOnCompleteExecuted = true;
                 mObservable.executeOnObserverThread(new OnCompleteRunnable<>(onSubscribe));
-            } else {
+            } else if (!mOnError) {
                 Log.e(TAG, "onComplete called more than once");
                 throw new RuntimeException("onComplete called more than once");
             }
@@ -181,7 +182,7 @@ public class Observable<T> {
         public void onError(@NonNull final Throwable throwable) {
             OnSubscribe<T> onSubscribe = mOnSubscribe;
             if (onSubscribe != null) {
-                mOnCompleteExecuted = true;
+                mOnError = true;
                 mObservable.executeOnObserverThread(new OnErrorRunnable<>(onSubscribe, throwable));
             }
         }