Support "..." VM frames in pkg/stack_trace.

pkg/stack_trace/lib/src/trace.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 trace;
 
 import 'dart:collection';
 import 'dart:math' as math;
 
 import 'frame.dart';
@@ skipping 54 matching lines @@
   factory Trace.from(StackTrace trace) {
     if (trace is Trace) return trace;
     return new LazyTrace(() => new Trace.parse(trace.toString()));
   }
 
   /// Parses a string representation of a stack trace.
   ///
   /// [trace] should be formatted in the same way as a Dart VM or browser stack
   /// trace.
   factory Trace.parse(String trace) {
-    if (trace.isEmpty) return new Trace(<Frame>[]);
-    if (trace.startsWith("Error\n")) return new Trace.parseV8(trace);
-    if (trace.contains(_firefoxTrace)) return new Trace.parseFirefox(trace);
-    if (trace.contains(_friendlyTrace)) return new Trace.parseFriendly(trace);
+    try {
+      if (trace.isEmpty) return new Trace(<Frame>[]);
+      if (trace.startsWith("Error\n")) return new Trace.parseV8(trace);
+      if (trace.contains(_firefoxTrace)) return new Trace.parseFirefox(trace);
+      if (trace.contains(_friendlyTrace)) return new Trace.parseFriendly(trace);
 
-    // Default to parsing the stack trace as a VM trace. This is also hit on IE
-    // and Safari, where the stack trace is just an empty string (issue 11257).
-    return new Trace.parseVM(trace);
+      // Default to parsing the stack trace as a VM trace. This is also hit on
+      // IE and Safari, where the stack trace is just an empty string (issue
+      // 11257).
+      return new Trace.parseVM(trace);
+    } on FormatException catch (error) {
+      throw new FormatException('${error.message}\nStack trace:\n$trace');
+    }
   }
 
   /// Parses a string representation of a Dart VM stack trace.
   Trace.parseVM(String trace)
       : this(trace.trim().split("\n").map((line) => new Frame.parseVM(line)));
 
   /// Parses a string representation of a Chrome/V8 stack trace.
   Trace.parseV8(String trace)
       : this(trace.split("\n").skip(1).map((line) => new Frame.parseV8(line)));
 
@@ skipping 57 matching lines @@
     // Figure out the longest path so we know how much to pad.
     var longest = frames.map((frame) => frame.location.length)
         .fold(0, math.max);
 
     // Print out the stack trace nicely formatted.
     return frames.map((frame) {
       return '${padRight(frame.location, longest)}  ${frame.member}\n';
     }).join();
   }
 }