Possible to crash command-not-found if ctrl+c is sent really really early

[Chris Tandiono]

It's possible to crash /usr/lib/command-not-found if a user presses ctrl+c before it imports "sys". This causes the exception handler to attempt to call "sys.exit(127)', but of course "sys" has not yet been imported. This kind of defeats the purpose of the KeyboardInterrupt exception handler and causes apport to start running, which it shouldn't, since there really isn't anything wrong.

Admittedly, it's hard to trigger this bug; I accidentally triggered it with the help of hdapsd to pause my hard disk while the first few imports are being made, but before "import sys" is run.

I've attached the patch which should resolve this issue. Whether it's particularly better than what we currently have isn't really clear. Perhaps "import sys" should be moved to before the try block.

[Zygmunt Krynicki (zyga)]

Thanks, I'll apply this