Add second argument to Future error handlers.

pkg/scheduled_test/lib/src/substitute_future.dart

Index: pkg/scheduled_test/lib/src/substitute_future.dart
diff --git a/pkg/scheduled_test/lib/src/substitute_future.dart b/pkg/scheduled_test/lib/src/substitute_future.dart
index abbb5d4f75058ab14fe2ac3ba480c12cf9e75759..c4b9ffb9c787ee7d127a604ff7d80d893654bcab 100644
--- a/pkg/scheduled_test/lib/src/substitute_future.dart
+++ b/pkg/scheduled_test/lib/src/substitute_future.dart
@@ -24,9 +24,9 @@ class SubstituteFuture<T> implements Future<T> {
   }
 
   Stream<T> asStream() => _completer.future.asStream();
-  Future catchError(onError(asyncError), {bool test(error)}) =>
+  Future catchError(Function onError, {bool test(error)}) =>
     _completer.future.catchError(onError, test: test);
-  Future then(onValue(T value), {onError(error)}) =>
+  Future then(onValue(T value), {Function onError}) =>
     _completer.future.then(onValue, onError: onError);
   Future<T> whenComplete(action()) => _completer.future.whenComplete(action);
 
@@ -44,9 +44,9 @@ class SubstituteFuture<T> implements Future<T> {
       if (_inner != newFuture) return;
       _completer.complete(value);
       _complete = true;
-    }).catchError((error) {
+    }).catchError((error, stackTrace) {
       if (_inner != newFuture) return;
-      _completer.completeError(error);
+      _completer.completeError(error, stackTrace);
       _complete = true;
     });
     return oldFuture;