open/run/close/reopen library then can't launch app

[danrubel]

[messick]
I opened the sunflower example and tried to run it. I got the dialog
in the attached screen shot instead.

This happens when you open a library, run it (optional I think), close
it, then re-open it. It doesn't not get re-opened correctly.
Force Recompile fixes it.

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Attachment:
[Screen shot 2011-12-07 at 7.56.51 AM.png](https://storage.googleapis.com/google-code-attachments/dart/issue-751/comment-0/Screen shot 2011-12-07 at 7.56.51 AM.png) (39.85 KB)

[danrubel]

I'll handle this one.

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Set owner to @danrubel.
Added Accepted label.

[danrubel]

Works for me in latest build.

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Added AssumedStale label.