This is a bug we just hit 5 minutes ago on 0.6: One of our CD builds failed because of a configuration issue - a variable wasn't properly set, leading terraform to continuously ask jenkins' stdin for a password.

We fixed the bug. But somehow, that previous build wiped the state file. When we pushed the fix, terraform freaked out and started deleting all our instances, including S3 redirects that weren't managed by it which we explicitly told it to ignore.

That sucked.