exception-future

exception-future.dart

import 'dart:async';

main() {
  Future.value(10).then((_) {
    Future(() => throw 'err').catchError((_){
      print('innner $_');
      throw 'no catch';
    });
    return _;
  }).then((_) {
    print('outer $_');
  }).catchError((_) {
    print('错误打印:$_');
  });
}