Adapt streams for additional stackTrace argument.

sdk/lib/async/stream_impl.dart

Index: sdk/lib/async/stream_impl.dart
diff --git a/sdk/lib/async/stream_impl.dart b/sdk/lib/async/stream_impl.dart
index 69aaf37d652024e7a97eca9c80ac361d12320162..80a3d3941e02c9baeaac7d4548bd362ae40c51f1 100644
--- a/sdk/lib/async/stream_impl.dart
+++ b/sdk/lib/async/stream_impl.dart
@@ -7,7 +7,7 @@ part of dart.async;
 /** Abstract and private interface for a place to put events. */
 abstract class _EventSink<T> {
   void _add(T data);
-  void _addError(Object error);
+  void _addError(Object error, StackTrace stackTrace);
   void _close();
 }
 
@@ -20,7 +20,7 @@ abstract class _EventSink<T> {
  */
 abstract class _EventDispatch<T> {
   void _sendData(T data);
-  void _sendError(Object error);
+  void _sendError(Object error, StackTrace stackTrace);
   void _sendDone();
 }
 
@@ -78,7 +78,7 @@ class _BufferingStreamSubscription<T> implements StreamSubscription<T>,
 
   /* Event handlers provided in constructor. */
   _DataHandler<T> _onData;
-  _ErrorHandler _onError;
+  Function _onError;
   _DoneHandler _onDone;
   final Zone _zone = Zone.current;
 
@@ -93,11 +93,11 @@ class _BufferingStreamSubscription<T> implements StreamSubscription<T>,
   _PendingEvents _pending;
 
   _BufferingStreamSubscription(void onData(T data),
-                               void onError(error),
+                               Function onError,
                                void onDone(),
                                bool cancelOnError)
       : _onData = Zone.current.registerUnaryCallback(onData),
-        _onError = Zone.current.registerUnaryCallback(onError),
+        _onError = _registerErrorHandler(onError, Zone.current),
         _onDone = Zone.current.registerCallback(onDone),
         _state = (cancelOnError ? _STATE_CANCEL_ON_ERROR : 0) {
     assert(_onData != null);
@@ -138,17 +138,17 @@ class _BufferingStreamSubscription<T> implements StreamSubscription<T>,
 
   void onData(void handleData(T event)) {
     if (handleData == null) handleData = _nullDataHandler;
-    _onData = handleData;
+    _onData = Zone.current.registerUnaryCallback(handleData);
   }
 
-  void onError(void handleError(error)) {
+  void onError(Function handleError) {
     if (handleError == null) handleError = _nullErrorHandler;
-    _onError = handleError;
+    _onError = _registerErrorHandler(handleError, Zone.current);
   }
 
   void onDone(void handleDone()) {
     if (handleDone == null) handleDone = _nullDoneHandler;
-    _onDone = handleDone;
+    _onDone = Zone.current.registerCallback(handleDone);
   }
 
   void pause([Future resumeSignal]) {
@@ -196,9 +196,9 @@ class _BufferingStreamSubscription<T> implements StreamSubscription<T>,
 
     // Overwrite the onDone and onError handlers.
     _onDone = () { result._complete(futureValue); };
-    _onError = (error) {
+    _onError = (error, stackTrace) {
       cancel();
-      result._completeError(error);
+      result._completeError(error, stackTrace);
     };
 
     return result;
@@ -259,12 +259,12 @@ class _BufferingStreamSubscription<T> implements StreamSubscription<T>,
     }
   }
 
-  void _addError(Object error) {
+  void _addError(Object error, StackTrace stackTrace) {
     if (_isCanceled) return;
     if (_canFire) {
-      _sendError(error);  // Reports cancel after sending.
+      _sendError(error, stackTrace);  // Reports cancel after sending.
     } else {
-      _addPending(new _DelayedError(error));
+      _addPending(new _DelayedError(error, stackTrace));
     }
   }
 
@@ -328,7 +328,7 @@ class _BufferingStreamSubscription<T> implements StreamSubscription<T>,
     _checkState(wasInputPaused);
   }
 
-  void _sendError(var error) {
+  void _sendError(var error, StackTrace stackTrace) {
     assert(!_isCanceled);
     assert(!_isPaused);
     assert(!_inCallback);
@@ -336,7 +336,9 @@ class _BufferingStreamSubscription<T> implements StreamSubscription<T>,
     _state |= _STATE_IN_CALLBACK;
     if (!_zone.inSameErrorZone(Zone.current)) {
       // Errors are not allowed to traverse zone boundaries.
-      Zone.current.handleUncaughtError(error, getAttachedStackTrace(error));
+      Zone.current.handleUncaughtError(error, stackTrace);
+    } else if (_onError is ZoneBinaryCallback) {
+      _zone.runBinaryGuarded(_onError, error, stackTrace);
     } else {
       _zone.runUnaryGuarded(_onError, error);
     }
@@ -424,7 +426,7 @@ abstract class _StreamImpl<T> extends Stream<T> {
   // Stream interface.
 
   StreamSubscription<T> listen(void onData(T data),
-                               { void onError(error),
+                               { Function onError,
                                  void onDone(),
                                  bool cancelOnError }) {
     if (onData == null) onData = _nullDataHandler;
@@ -466,7 +468,7 @@ class _GeneratedStreamImpl<T> extends _StreamImpl<T> {
   _GeneratedStreamImpl(this._pending);
 
   StreamSubscription _createSubscription(void onData(T data),
-                                         void onError(Object error),
+                                         Function onError,
                                          void onDone(),
                                          bool cancelOnError) {
     _BufferingStreamSubscription<T> subscription =
@@ -502,7 +504,7 @@ class _IterablePendingEvents<T> extends _PendingEvents {
       isDone = !_iterator.moveNext();
     } catch (e, s) {
       _iterator = null;
-      dispatch._sendError(_asyncError(e, s));
+      dispatch._sendError(_asyncError(e, s), s);
       return;
     }
     if (!isDone) {
@@ -524,7 +526,6 @@ class _IterablePendingEvents<T> extends _PendingEvents {
 
 // Types of the different handlers on a stream. Types used to type fields.
 typedef void _DataHandler<T>(T value);
-typedef void _ErrorHandler(error);
 typedef void _DoneHandler();
 
 
@@ -532,8 +533,8 @@ typedef void _DoneHandler();
 void _nullDataHandler(var value) {}
 
 /** Default error handler, reports the error to the current zone's handler. */
-void _nullErrorHandler(error) {
-  Zone.current.handleUncaughtError(error, getAttachedStackTrace(error));
+void _nullErrorHandler(error, [StackTrace stackTrace]) {
+  Zone.current.handleUncaughtError(error, stackTrace);
 }
 
 /** Default done handler, does nothing. */
@@ -560,9 +561,11 @@ class _DelayedData<T> extends _DelayedEvent {
 /** A delayed error event. */
 class _DelayedError extends _DelayedEvent {
   final error;
-  _DelayedError(this.error);
+  final StackTrace stackTrace;
+
+  _DelayedError(this.error, this.stackTrace);
   void perform(_EventDispatch dispatch) {
-    dispatch._sendError(error);
+    dispatch._sendError(error, stackTrace);
   }
 }
 
@@ -704,7 +707,7 @@ class _DummyStreamSubscription<T> implements StreamSubscription<T> {
   int _pauseCounter = 0;
 
   void onData(void handleData(T data)) {}
-  void onError(void handleError(Object data)) {}
+  void onError(Function handleError) {}
   void onDone(void handleDone()) {}
 
   void pause([Future resumeSignal]) {
@@ -741,7 +744,7 @@ class _AsBroadcastStream<T> extends Stream<T> {
   bool get isBroadcast => true;
 
   StreamSubscription<T> listen(void onData(T data),
-                               { void onError(Object error),
+                               { Function onError,
                                  void onDone(),
                                  bool cancelOnError}) {
     if (_controller == null) {
@@ -976,12 +979,12 @@ class _StreamIteratorImpl<T> implements StreamIterator<T> {
     _state = _STATE_EXTRA_DATA;
   }
 
-  void _onError(Object error) {
+  void _onError(Object error, [StackTrace stackTrace]) {
     if (_state == _STATE_MOVING) {
       _Future<bool> hasNext = _futureOrPrefetch;
       // We have cancelOnError: true, so the subscription is canceled.
       _clear();
-      hasNext._completeError(error);
+      hasNext._completeError(error, stackTrace);
       return;
     }
     _subscription.pause();