cmd/vet's docs (http://godoc.org/code.google.com/p/go.tools/cmd/vet) state the following:

> Vet's exit code is 2 for erroneous invocation of the tool, 1 if a problem was
reported, and 0 otherwise.

However, sometimes its exit code is 0 even when there are problems found. Specifically,
the exit code is always 0 whenever valid input that is a directory is given, regardless
if problems were reported or otherwise.

Thanks to Krzysztof (https://github.com/kjk) for originally discovering this issue.

The fix is relatively trivial so I will be submitting a CL that fixes this shortly.


What does 'go version' print?

go version go1.3.1 darwin/amd64

What steps reproduce the problem?
If possible, include a link to a program on play.golang.org.

1. run `go tool vet ./some-directory-with-problems/`
2. run `echo $?`

What happened?

exit code: 0

What should have happened instead?

exit code: 1