rust-lang/cargo — pull request #1021 by alexcrichton (2014-12-08 22:52:02+00:00)
Title: Rebuild files if target directory is corrupt

If manual modifications have been made or if cargo/rustc died for some sort of
error, then we don't consider a target as being fresh. If any of the files
output by a target don't end up existing in the target directory (even if the
fingerprint says they do), then we consider the target not fresh.

cc #986