Improve the display of data: URIs in stack traces.

lib/src/frame.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.
 
 library frame;
 
 import 'package:path/path.dart' as path;
 
 import 'trace.dart';
 import 'unparsed_frame.dart';
@@ skipping 77 matching lines @@
   /// Anonymous closures are represented as `<fn>` in this member string.
   final String member;
 
   /// Whether this stack frame comes from the Dart core libraries.
   bool get isCore => uri.scheme == 'dart';
 
   /// Returns a human-friendly description of the library that this stack frame
   /// comes from.
   ///
   /// This will usually be the string form of [uri], but a relative URI will be
-  /// used if possible.
-  String get library => path.prettyUri(uri);
+  /// used if possible. Data URIs will be truncated.
+  String get library {
+    if (uri.scheme == 'data') return "data:...";
+    return path.prettyUri(uri);
+  }
 
   /// Returns the name of the package this stack frame comes from, or `null` if
   /// this stack frame doesn't come from a `package:` URL.
   String get package {
     if (uri.scheme != 'package') return null;
     return uri.path.split('/').first;
   }
 
   /// A human-friendly description of the code location.
   String get location {
@@ skipping 184 matching lines @@
       return body();
     } on FormatException catch (_) {
       return new UnparsedFrame(text);
     }
   }
 
   Frame(this.uri, this.line, this.column, this.member);
 
   String toString() => '$location in $member';
 }