DartBot
commented
9 years ago 
I'd dearly love to get rid of this message, but unfortunately the VM provides no way to control it (issue dart-lang/sdk#20784) and no alternate way to check if a snapshot is up-to-date (issue dart-lang/sdk#20802).
In theory we could try to filter the executable's stdout for this specific message, but in practice doing this in both the binstub scripts and pub itself a way that doesn't cause further problems is nearly impossible.
Marked this as being blocked by dart-lang/sdk#20784, dart-lang/sdk#20802.
sigurdm
Hi,
Usability/aesthetics request. When changing your Dart version, and then running a script from pub's bin cache, we'll see this:
sethladd@sethladd-macbookair ~/tmp/angulartest $ stagehand ubersimplewebapp Wrong script snapshot version, expected '9b71a36fb6f35a4247b4baef055b2626' found '836a274342f7f88d6b5a9bb59b2649a9' Wrong script snapshot version, expected '9b71a36fb6f35a4247b4baef055b2626' found '836a274342f7f88d6b5a9bb59b2649a9' Creating ubersimplewebapp application 'angulartest': /Users/sethladd/tmp/angulartest/.gitignore /Users/sethladd/tmp/angulartest/CHANGELOG.md /Users/sethladd/tmp/angulartest/LICENSE /Users/sethladd/tmp/angulartest/README.md /Users/sethladd/tmp/angulartest/pubspec.yaml /Users/sethladd/tmp/angulartest/web/index.html /Users/sethladd/tmp/angulartest/web/main.dart /Users/sethladd/tmp/angulartest/web/styles/main.css 8 files written.
--> to provision required packages, run 'pub get' sethladd@sethladd-macbookair ~/tmp/angulartest $
Notice the two "wrong script snapshot version" messages. Two messages is a bit weird, and the message itself isn't that useful to an end user.
Could we display something more user friendly? Suggestion: "Dart VM version changed, generating new snapshot for app"
Thanks!