F:\Flutter\flutter\.pub-cache\hosted\pub.flutter-io.cn\get-4.6.5\example>flutter pub get
Flutter assets will be downloaded from https://storage.flutter-io.cn. Make sure you trust this source!
Null check operator used on a null value
package:pub/src/entrypoint.dart 157:60 Entrypoint.lockFilePath
package:pub/src/entrypoint.dart 100:21 Entrypoint._loadLockFile
package:pub/src/entrypoint.dart 97:42 Entrypoint.lockFile
package:pub/src/entrypoint.dart 286:21 Entrypoint.acquireDependencies.<fn>
package:pub/src/entrypoint.dart 280:68 Entrypoint.acquireDependencies.<fn>
package:pub/src/log.dart 428:18 progress
package:pub/src/entrypoint.dart 280:26 Entrypoint.acquireDependencies
package:pub/src/command/get.dart 52:22 GetCommand.runProtected
package:pub/src/command.dart 183:45 PubCommand.run.<fn>
package:pub/src/command.dart 183:33 PubCommand.run.<fn>
dart:async new Future.sync
package:pub/src/utils.dart 109:12 captureErrors.wrappedCallback
dart:async runZonedGuarded
package:pub/src/utils.dart 126:5 captureErrors
package:pub/src/command.dart 183:13 PubCommand.run
package:args/command_runner.dart 209:27 CommandRunner.runCommand
package:pub/src/command_runner.dart 174:24 PubCommandRunner.runCommand
package:pub/src/command_runner.dart 159:20 PubCommandRunner.run
package:dartdev/dartdev.dart 45:56 runDartdev
C:\b\s\w\ir\cache\builder\sdk\pkg\dartdev\bin\dartdev.dart 11:9 main
This is an unexpected error. The full log and other details are collected in:
F:\Flutter\flutter\.pub-cache\log\pub_log.txt
Consider creating an issue on https://github.com/dart-lang/pub/issues/new
and attaching the relevant parts of that log file.
.
Running "flutter pub get" in example...
pub get failed (255; .)
（上面是cmd运行出来的 ）没有bash