当我在Visual Studio代码中的调试控制台中运行Flutter应用程序时。我收到以下消息

"Launching lib\main.dart on AOSP on IA Emulator in debug mode...
    √  Built build\app\outputs\flutter-apk\app-debug.apk.
    Connecting to VM Service at ws://127.0.0.1:61843/B4tZiYo4ANE=/ws
    I/madra.brew_cre(10170): Background concurrent copying GC freed 28317(6MB) 
    AllocSpace 
    objects, 5(96KB) LOS objects, 49% free, 1944KB/3MB, paused 1.286ms total 114.385ms
    D/eglCodecCommon(10170): setVertexArrayObject: set vao to 0 (0) 1 0
    D/EGL_emulation(10170): eglMakeCurrent: 0xe9586440: ver 2 0 (tinfo 0xd0ce8ff0)"

然后我在socket_patch.dart文件中得到一个错误

"Failed host lookup: '$host'"

但我注意到，当我从终端或Android Studio运行相同的程序时。它成功地构建了，当我在运行时将其限制在一个观察端口时，它也构建得很好。当我在终端和调试控制台上运行时，唯一的区别是当我从终端运行它时，它会自动在不同的端口上运行它。

"Launching lib\main.dart on AOSP on IA Emulator in debug mode...
 Running Gradle task 'assembleDebug'...                              9.7s
 √  Built build\app\outputs\flutter-apk\app-debug.apk.
 Syncing files to device AOSP on IA Emulator...                     217ms
 A Dart VM Service on AOSP on IA Emulator is available at: 
 http://127.0.0.1:62597/G44aJh3yYYE=/
 The Flutter DevTools debugger and profiler on AOSP on IA Emulator is available at: 
 http://127.0.0.1:9101?uri=http://127.0.0.1:62597/G44aJh3yYYE=/
 D/eglCodecCommon(10659): setVertexArrayObject: set vao to 0 (0) 1 0
 D/EGL_emulation(10659): eglMakeCurrent: 0xd67fd2e0: ver 2 0 (tinfo 0xe7b2ac70)"

我想我可能有代理设置或http/https环境变量设置，导致这种行为，但我的系统设置为自动检测代理设置。