This issue was originally filed by daniel.robinson...@gmail.com

What steps will reproduce the problem?

1. I manually clicked to run pub get on my project pubspec.yaml file whilst a pub get was already in process on that pubspec. I was then in the state where my download of unittest 0.11.0+5 package was corrupted as it didn't have its own pubspec file inside.
2. Then running pub cache repair failed also because unittests pubspec didnt exist

What is the expected output? What do you see instead?
I think if a pub get is in progress it should probably queue up further pub get calls so as to not corrupt package downloads (assuming that was the cause of the corruption) If you run pub cache repair and it comes across a corrupt package that doesn't have a pubspec.yaml file in it then it should delete the package completely and redownload it, rather than just getting stuck.

What version of the product are you using?

Dart Editor version 1.8.0.dev_00_00 (DEV)
Dart SDK version 1.8.0-dev.0.0

On what operating system?
windows 7 64bit