pub hanging when hitting refresh after changing a file.

[Pacane]

I don't know if the problem is here or not but I'm trying anyway. I've opened an issue @ angular.dart already but I have no answer whatsoever.

I'm trying to reopen it here because I think it may have something to do with barback...

Overview of the Issue - When I launch the project, it works fine. When I change a line of the code, and press Refresh in Dartium, it will just never refresh.

If I take a look at pub's log sometimes I can see errors like this after editing a file:

Build error:
Failed to load source asset grocery_store|lib/grocery_list_component.dart___jb_bak___: Could not find asset grocery_store|lib/grocery_list_component.dart___jb_bak___.
/mnt/data/b/build/slave/dart-editor-linux-dev/build/dart/sdk/lib/_internal/pub/lib/src/barback/pub_package_provider.dart 82  PubPackageProvider._assertExists
/mnt/data/b/build/slave/dart-editor-linux-dev/build/dart/sdk/lib/_internal/pub/lib/src/barback/pub_package_provider.dart 76  PubPackageProvider.getAsset.<async>
dart:isolate 

Note that this error is produced while developing with IntelliJ, but I have also tried editing a file with Vim, but it doesn't work either. (However I don't see these error messages ^)

Use case - It does it with 2 of my Angular apps, and doesn't do it with other apps that don't use Angular.
Angular Version(s) - 1.1.1
Dart Version - 1.9.1 (I've also tried with unstable 1.10.0-dev.1.1)
Browsers and Operating System - is this a problem with all browsers? Dartium stable
Reproduce the Error :

• Take this project, on master branch. https://github.com/Pacane/grocery-store
• pub upgrade
• pub serve
• Go in dartium and press "Add item" (an item should be added to the list)
• Now go in grocery_list_component.dart and comment the body of the method addItem() - it should prevent the item to be added to the list
• Refresh and Dartium
• Page never refreshes -- it keeps spinning
• If you're lucky, you should see errors in pub (doesn't always happen)
  Related Issues - has a similar issue been reported before? I haven't seen any.

Workaround: - A current work around is to restart pub, but this is not viable.

[nex3]

If you see the hanging issue without the ___jb_bak___ errors, it's unlikely that they're the cause.

In general, it's possible for complex transformers that communicate with one another out-of-band to deadlock. We've seen this before with the Angular transformers in particular, so until more information pops up, I'm going to close this on the assumption that it's a bug in Angular rather than barback.