Error when pub upgrade flutter tool

[kafji]

Running flutter doctor on MacOS resulting with these error codes:

Downloading Dart SDK from Flutter engine ead227f118077d1f2b57842a32abaf105b573b8a...
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 43.3M  100 43.3M    0     0   141k      0  0:05:13  0:05:13 --:--:--  218k
Building flutter tool...
gzip: (stdin): trailing garbage ignored
tar: Child returned status 1
tar: Error is not recoverable: exiting now
gzip: (stdin): trailing garbage ignored
tar: Child returned status 1
tar: Error is not recoverable: exiting now
Failed to extract .tar.gz stream to /Users/mine/.pub-cache/_temp/dirA3ajh1 (exit code 2).
package:pub/src/io.dart 928                                                              extractTarGz
===== asynchronous gap ===========================
package:pub/src/source/hosted.dart 302                                                   BoundHostedSource._download
===== asynchronous gap ===========================
package:pub/src/source/hosted.dart 196                                                   BoundHostedSource.downloadToSystemCache
===== asynchronous gap ===========================
package:pub/src/entrypoint.dart 525                                                      Entrypoint._get.<fn>
===== asynchronous gap ===========================
dart:async                                                                               runZoned
package:pub/src/http.dart 267                                                            withDependencyType
package:pub/src/entrypoint.dart 520                                                      Entrypoint._get
package:pub/src/entrypoint.dart 233                                                      Entrypoint.acquireDependencies.<fn>
dart:async                                                                               Future.wait
package:pub/src/entrypoint.dart 233                                                      Entrypoint.acquireDependencies
===== asynchronous gap ===========================
package:pub/src/command/upgrade.dart 41                                                  UpgradeCommand.run
===== asynchronous gap ===========================
package:args/command_runner.dart 194                                                     CommandRunner.runCommand
===== asynchronous gap ===========================
package:pub/src/command_runner.dart 167                                                  PubCommandRunner.runCommand.<fn>
dart:async                                                                               new Future.sync
package:pub/src/utils.dart 103                                                           captureErrors.<fn>
dart:async                                                                               runZoned
package:pub/src/utils.dart 122                                                           captureErrors
package:pub/src/command_runner.dart 167                                                  PubCommandRunner.runCommand
===== asynchronous gap ===========================
package:pub/src/command_runner.dart 116                                                  PubCommandRunner.run
===== asynchronous gap ===========================
/b/build/slave/Mac_Engine/build/src/third_party/dart/third_party/pkg/pub/bin/pub.dart 8  main
This is an unexpected error. Please run

    pub --trace upgrade --verbosity=error --no-packages-dir

and include the logs in an issue on https://github.com/dart-lang/pub/issues/new
Error: Unable to pub upgrade flutter tool. Retrying in five seconds...

Running pub --trace upgrade --verbosity=error --no-packages-dir from flutter/bin/cache/dart-sdk/bin resulting with error message:

Could not find a file named "pubspec.yaml" in "/Users/mine/flutter/bin/cache/dart-sdk/bin".
---- Log transcript ----
FINE: Pub 2.0.0-edge.0d5cf900b021bf5c9fa593ffa12b15bcd1cc5fe0
ERR : Could not find a file named "pubspec.yaml" in "/Users/mine/flutter/bin/cache/dart-sdk/bin".
FINE: Exception type: FileException
FINE: package:pub/src/pubspec.dart 585         new Pubspec.load
    | package:pub/src/package.dart 139         new Package.load
    | package:pub/src/entrypoint.dart 149      new Entrypoint
    | package:pub/src/command.dart 42          PubCommand.entrypoint
    | package:pub/src/command/upgrade.dart 41  UpgradeCommand.run
    | ===== asynchronous gap ===========================
    | dart:async                               _Completer.completeError
    | package:pub/src/command/upgrade.dart     UpgradeCommand.run
    | ===== asynchronous gap ===========================
    | dart:async                               new Future.microtask
    | package:pub/src/command/upgrade.dart 40  UpgradeCommand.run
    | package:args/command_runner.dart 194     CommandRunner.runCommand
    | ===== asynchronous gap ===========================
    | dart:async                               new Future.microtask
    | package:args/command_runner.dart 142     CommandRunner.runCommand
    | package:pub/src/command_runner.dart 167  PubCommandRunner.runCommand.<fn>
    | dart:async                               new Future.sync
    | package:pub/src/utils.dart 103           captureErrors.<fn>
    | package:stack_trace                      Chain.capture
    | package:pub/src/utils.dart 118           captureErrors
    | package:pub/src/command_runner.dart 167  PubCommandRunner.runCommand
---- End log transcript ----

[nex3]

@kafji Your pub --trace command isn't right; you need to run it in a flutter context for it to produce the right output. @Hixie, What's the right way to get a trace for a pub error run from Flutter?

[Hixie]

flutter -v enables verbose mode, i forget if that enables it in downstream pub calls... @tvolkert might know

[tvolkert]

Right now it doesn't:

https://github.com/flutter/flutter/blob/70f60b17d7de9844c356fb7ab0e2cf1630a70965/packages/flutter_tools/lib/src/dart/pub.dart#L96

I'll send a PR to enable it.

[tvolkert]

What's not clear to me here is why flutter doctor is trying to run pub at all...

[sigurdm]

Not sure what is going on here - a broken download?

Tentatively closing this as stale. Please reopen if this is still happening.