Remove AsyncError with Expando.

utils/pub/io.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /// Helper functionality to make working with IO easier.
 library io;
 
 import 'dart:async';
 import 'dart:io';
 import 'dart:isolate';
@@ skipping 281 matching lines @@
 // TODO: Unrequired wrapper, stdout is now an EventSink<List<int>>.
 final EventSink<List<int>> stderrSink = _wrapStdio(stderr, "stderr");
 
 /// Wrap the standard output or error [stream] in a [EventSink]. Any errors are
 /// logged, and then the program is terminated. [name] is used for debugging.
 EventSink<List<int>> _wrapStdio(IOSink sink, String name) {
   var pair = consumerToSink(sink);
   pair.last.catchError((e) {
     // This log may or may not work, depending on how the stream failed. Not
     // much we can do about that.
-    log.error("Error writing to $name: $e");
+    log.error("Error writing to $name", e);
     exit(exit_codes.IO);
   });
   return pair.first;
 }
 
 /// A line-by-line stream of standard input.
 final Stream<String> stdinLines = streamToLines(
     new ByteStream(stdin).toStringStream());
 
 /// Displays a message and reads a yes/no confirmation from the user. Returns
@@ skipping 350 matching lines @@
     var args = ["--create", "--gzip", "--directory", baseDir];
     args.addAll(contents);
     // TODO(nweiz): It's possible that enough command-line arguments will make
     // the process choke, so at some point we should save the arguments to a
     // file and pass them in via --files-from for tar and -i@filename for 7zip.
     startProcess("tar", args).then((process) {
       store(process.stdout, controller);
     }).catchError((e) {
       // We don't have to worry about double-signaling here, since the store()
       // above will only be reached if startProcess succeeds.
-      controller.addError(e.error, e.stackTrace);
+      controller.addError(e);
       controller.close();
     });
     return new ByteStream(controller.stream);
   }
 
   withTempDir((tempDir) {
     // Create the tar file.
     var tarFile = path.join(tempDir, "intermediate.tar");
     var args = ["a", "-w$baseDir", tarFile];
     args.addAll(contents.map((entry) => '-i!"$entry"'));
@@ skipping 16 matching lines @@
       // Ignore 7zip's stderr. 7zip writes its normal output to stderr. We don't
       // want to show that since it's meaningless.
       //
       // TODO(rnystrom): Should log the stderr and display it if an actual error
       // occurs.
       return store(process.stdout, controller);
     });
   }).catchError((e) {
     // We don't have to worry about double-signaling here, since the store()
     // above will only be reached if everything succeeds.
-    controller.addError(e.error, e.stackTrace);
+    controller.addError(e);
     controller.close();
   });
   return new ByteStream(controller.stream);
 }
 
 /// Exception thrown when an operation times out.
 class TimeoutException implements Exception {
   final String message;
 
   const TimeoutException(this.message);
@@ skipping 10 matching lines @@
   const PubProcessResult(this.stdout, this.stderr, this.exitCode);
 
   bool get success => exitCode == 0;
 }
 
 /// Gets a [Uri] for [uri], which can either already be one, or be a [String].
 Uri _getUri(uri) {
   if (uri is Uri) return uri;
   return Uri.parse(uri);
 }