Upgrade problem of Dart to use flutter gallery.

[baeharam]

When I tried to use flutter gallery, I got this error message.

Because flutter_gallery depends on shelf >=0.7.3+2 which requires SDK version >=2.0.0-dev.61.0 <2.0.0, version solving failed.
pub upgrade failed (1)

So I wanted to upgrade dart SDK to dev.61.0, but how can I upgrade? I installed choco and upgarded dart but it didn't work not at all. My flutter doctor said like below.

[√] Flutter (Channel beta, v0.5.1, on Microsoft Windows [Version 10.0.17134.165], locale ko-KR)
• Flutter version 0.5.1 at C:\flutter
• Framework revision c7ea3ca (7 weeks ago), 2018-05-29 21:07:33 +0200
• Engine revision 1ed25ca
• Dart version 2.0.0-dev.58.0.flutter-f981f09760

Yes, my Dart version is 2.00-dev.58.0, but I need 2.00-dev.61.0 to see WHAT FLUTTER GALLERY IS.
How can I fix it?

[Leo486597]

The same issue I just faced when I was in Master branch by default, checkout the beta branch will be fine.

git checkout -t origin/beta
flutter packages get

[zoechi]

You can try

flutter channel dev
flutter doctor

I'm not sure what channel flutter_gallery is tested with.

[baeharam]

@zoechi @leo-chaoliu Sorry for late answer, I had an appendectomy. It was solved by @leo-chaoliu :)

[zoechi]

@baeharam thanks for the update. Then let's close this issue.

[ibanjac]

Hello, i have the same issue
[flutter_gallery] flutter packages get
Running "flutter packages get" in flutter_gallery...
The current Dart SDK version is 2.0.0-dev.58.0.flutter-f981f09760.

Because flutter_gallery depends on shelf >=0.7.3+2 which requires SDK version >=2.0.0-dev.61.0 <3.0.0, version solving failed.
pub get failed (1)
exit code 1

Flutter doctor
[√] Flutter (Channel beta, v0.5.1, on Microsoft Windows [Version 6.3.9600], locale en-US)
• Flutter version 0.5.1 at C:\Project\flutter
• Framework revision c7ea3ca (2 months ago), 2018-05-29 21:07:33 +0200
• Engine revision 1ed25ca
• Dart version 2.0.0-dev.58.0.flutter-f981f09760
I have the latest flutter and dart sdk and plugins
I have installed the latest dart release
Dart VM version: 2.0.0-dev.69.5 (Tue Jul 31 15:05:14 2018 +0200) on "windows_x64"
I am also in beta channel (i have tried other channels, still fails)

[zoechi]

Dart version 2.0.0-dev.58.0.flutter-f981f09760

@ibanjac sounds like you need to update to a newer Flutter version that ships with requires SDK version >=2.0.0-dev.61.0

[ibanjac]

I have the latest flutter sdk, latest Dart VM version: 2.0.0-dev.69.5, latest vs code plugins

[zoechi]

@ibanjac The installed Dart VM version doesn't matter, only the Dart VM version shipped with Flutter.
Try

flutter channel dev
flutter upgrade

[github-actions]

This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.