webdev could not run for this project.
This version of webdev does not support the `build_daemon` protocol used by your version of `build_runner`.
A newer version of webdev is available which supports your version of the `build_daemon`. Please update.
解决办法 更新
flutter upgrade #更改一次flutter的版本花费很长时间 。git 目录更新可能快点没尝试。
pub global activate webdev
or
flutter packages pub global activate webdev
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