Unable to enter multi-byte characters in Windows console

[maxfrees]

I entered multi-byte characters directly in Windows Console.
But I can't get the correct byte data from stdin.

sample code:

import 'dart:io';

void main() async {
  await for (var i in stdin) {
    print(i);
  }
}
In Powershell 7(code page 65001),
I typed 'あ'(U+3042, utf-8: 0xE38182=[227 129 130]).

Direct input -- Bad:

> dart .\bin\main.dart
あ
[0, 13, 10]
Pipe -- OK:

> echo あ | dart .\bin\main.dart
[227, 129, 130, 13, 10]

I expected the results of direct input to be the same as the pipe version.

Dart VM version: 2.7.2 (Mon Mar 23 22:11:27 2020 +0100) on "windows_x64"
Windows 10 Pro(1909)
Powershell 7.0.0

ref #41562

[mraleph]

Duplicate of #41562