Après avoir changé sur une branche 'stable' canal à flutter
Ce qui suit est le problème de construction.
ERREUR: La version de langue spécifiée est trop élevée. La version la plus élevée en langue pris en charge est de 2,8.
output: ../../third_party/Dart/third_party/pkg/collection/lib/src/utils.Dart:1:1: Error: The specified language version is too high. The highest supported language version is 2.8.
// Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file
^
../../third_party/Dart/third_party/pkg/collection/lib/src/wrappers.Dart:1:1: Error: The specified language version is too high. The highest supported language version is 2.8.
// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
^
../../third_party/Dart/third_party/pkg/collection/lib/src/functions.Dart:1:1: Error: The specified language version is too high. The highest supported language version is 2.8.
// Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file
^