dart_stacktrace_issue.dart

The current dart:async getAttachedStackTrace could potentially be used for sync errors as well, in which case the API could move directly to the StackTrace class:

class StackTrace {
  /// the [StackTrace] attached to the given [error]
  StackTrace.attachedTo(var error);
  /// attach the current [StackTrace] to the given [error].
  static void attach(var error);
  //...
}

the "throw" construct could implicitly call StackTrace.attach, and possibly could then get rid of the "catch(error, stackTrace)" construct

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