Adapt streams for additional stackTrace argument.

sdk/lib/async/stream_pipe.dart

Index: sdk/lib/async/stream_pipe.dart
diff --git a/sdk/lib/async/stream_pipe.dart b/sdk/lib/async/stream_pipe.dart
index b126747d848bcaa84ebe0315132ecc37ff042330..3494de541e476f479cbdeec0d65e17f7d762fb93 100644
--- a/sdk/lib/async/stream_pipe.dart
+++ b/sdk/lib/async/stream_pipe.dart
@@ -16,19 +16,21 @@ _asyncError(Object error, Object stackTrace) {
 }
 
 /** Runs user code and takes actions depending on success or failure. */
-_runUserCode(userCode(), onSuccess(value), onError(error)) {
+_runUserCode(userCode(),
+             onSuccess(value),
+             onError(error, StackTrace stackTrace)) {
   try {
     onSuccess(userCode());
   } catch (e, s) {
-    onError(_asyncError(e, s));
+    onError(_asyncError(e, s), s);
   }
 }
 
 /** Helper function to make an onError argument to [_runUserCode]. */
 _cancelAndError(StreamSubscription subscription, _Future future) =>
-  (error) {
+  (error, StackTrace stackTrace) {
     subscription.cancel();
-    future._completeError(error);
+    future._completeError(error, stackTrace);
   };
 
 
@@ -49,7 +51,7 @@ abstract class _ForwardingStream<S, T> extends Stream<T> {
   bool get isBroadcast => _source.isBroadcast;
 
   StreamSubscription<T> listen(void onData(T value),
-                              { void onError(error),
+                              { Function onError,
                                 void onDone(),
                                 bool cancelOnError }) {
     if (onData == null) onData = _nullDataHandler;
@@ -60,7 +62,7 @@ abstract class _ForwardingStream<S, T> extends Stream<T> {
   }
 
   StreamSubscription<T> _createSubscription(void onData(T value),
-                                            void onError(error),
+                                            Function onError,
                                             void onDone(),
                                             bool cancelOnError) {
     return new _ForwardingStreamSubscription<S, T>(
@@ -74,8 +76,8 @@ abstract class _ForwardingStream<S, T> extends Stream<T> {
     sink._add(outputData);
   }
 
-  void _handleError(error, _EventSink<T> sink) {
-    sink._addError(error);
+  void _handleError(error, StackTrace stackTrace, _EventSink<T> sink) {
+    sink._addError(error, stackTrace);
   }
 
   void _handleDone(_EventSink<T> sink) {
@@ -94,7 +96,7 @@ class _ForwardingStreamSubscription<S, T>
 
   _ForwardingStreamSubscription(this._stream,
                                 void onData(T data),
-                                void onError(error),
+                                Function onError,
                                 void onDone(),
                                 bool cancelOnError)
       : super(onData, onError, onDone, cancelOnError) {
@@ -113,9 +115,9 @@ class _ForwardingStreamSubscription<S, T>
     super._add(data);
   }
 
-  void _addError(Object error) {
+  void _addError(Object error, StackTrace stackTrace) {
     if (_isClosed) return;
-    super._addError(error);
+    super._addError(error, stackTrace);
   }
 
   // StreamSubscription callbacks.
@@ -144,8 +146,8 @@ class _ForwardingStreamSubscription<S, T>
     _stream._handleData(data, this);
   }
 
-  void _handleError(error) {
-    _stream._handleError(error, this);
+  void _handleError(error, StackTrace stackTrace) {
+    _stream._handleError(error, stackTrace, this);
   }
 
   void _handleDone() {
@@ -170,7 +172,7 @@ class _WhereStream<T> extends _ForwardingStream<T, T> {
     try {
       satisfies = _test(inputEvent);
     } catch (e, s) {
-      sink._addError(_asyncError(e, s));
+      sink._addError(_asyncError(e, s), s);
       return;
     }
     if (satisfies) {
@@ -196,7 +198,7 @@ class _MapStream<S, T> extends _ForwardingStream<S, T> {
     try {
       outputEvent = _transform(inputEvent);
     } catch (e, s) {
-      sink._addError(_asyncError(e, s));
+      sink._addError(_asyncError(e, s), s);
       return;
     }
     sink._add(outputEvent);
@@ -220,13 +222,12 @@ class _ExpandStream<S, T> extends _ForwardingStream<S, T> {
     } catch (e, s) {
       // If either _expand or iterating the generated iterator throws,
       // we abort the iteration.
-      sink._addError(_asyncError(e, s));
+      sink._addError(_asyncError(e, s), s);
     }
   }
 }
 
 
-typedef void _ErrorTransformation(error);
 typedef bool _ErrorTest(error);
 
 /**
@@ -234,33 +235,37 @@ typedef bool _ErrorTest(error);
  * before passing them on.
  */
 class _HandleErrorStream<T> extends _ForwardingStream<T, T> {
-  final _ErrorTransformation _transform;
+  final Function _transform;
   final _ErrorTest _test;
 
   _HandleErrorStream(Stream<T> source,
-                    void transform(event),
-                    bool test(error))
-      : this._transform = transform, this._test = test, super(source);
+                     Function onError,
+                     bool test(error))
+      : this._transform = onError, this._test = test, super(source);
 
-  void _handleError(Object error, _EventSink<T> sink) {
+  void _handleError(Object error, StackTrace stackTrace, _EventSink<T> sink) {
     bool matches = true;
     if (_test != null) {
       try {
         matches = _test(error);
       } catch (e, s) {
-        sink._addError(_asyncError(e, s));
+        sink._addError(_asyncError(e, s), s);
         return;
       }
     }
     if (matches) {
       try {
-        _transform(error);
+        _invokeErrorHandler(_transform, error, stackTrace);
       } catch (e, s) {
-        sink._addError(_asyncError(e, s));
+        if (identical(e, error)) {
+          sink._addError(error, stackTrace);
+        } else {
+          sink._addError(_asyncError(e, s), s);
+        }
         return;
       }
     } else {
-      sink._addError(error);
+      sink._addError(error, stackTrace);
     }
   }
 }
@@ -301,7 +306,7 @@ class _TakeWhileStream<T> extends _ForwardingStream<T, T> {
     try {
       satisfies = _test(inputEvent);
     } catch (e, s) {
-      sink._addError(_asyncError(e, s));
+      sink._addError(_asyncError(e, s), s);
       // The test didn't say true. Didn't say false either, but we stop anyway.
       sink._close();
       return;
@@ -349,7 +354,7 @@ class _SkipWhileStream<T> extends _ForwardingStream<T, T> {
     try {
       satisfies = _test(inputEvent);
     } catch (e, s) {
-      sink._addError(_asyncError(e, s));
+      sink._addError(_asyncError(e, s), s);
       // A failure to return a boolean is considered "not matching".
       _hasFailed = true;
       return;
@@ -385,7 +390,7 @@ class _DistinctStream<T> extends _ForwardingStream<T, T> {
           isEqual = _equals(_previous, inputEvent);
         }
       } catch (e, s) {
-        sink._addError(_asyncError(e, s));
+        sink._addError(_asyncError(e, s), s);
         return null;
       }
       if (!isEqual) {
@@ -399,7 +404,7 @@ class _DistinctStream<T> extends _ForwardingStream<T, T> {
 // Stream transformations and event transformations.
 
 typedef void _TransformDataHandler<S, T>(S data, EventSink<T> sink);
-typedef void _TransformErrorHandler<T>(data, EventSink<T> sink);
+typedef void _TransformErrorHandler<T>(Object error, EventSink<T> sink);
 typedef void _TransformDoneHandler<T>(EventSink<T> sink);
 
 /** Default data handler forwards all data. */