CL 40112 added the ability for go vet to pass through the flags that go tool vet takes. -shift was omitted in the whitelist, which seems like an oversight.

The fix is trivial, CL forthcoming.

What version of Go are you using (go version)?

go version devel +b4e207d Wed Oct 25 20:20:44 2017 +0000 linux/amd64

Does this issue reproduce with the latest release?

Yes

What operating system and processor architecture are you using (go env)?

linux/amd64

What did you do?

https://play.golang.org/p/j_a0OxUDwc

$ go tool vet -shift shift.go
shift.go:5: u (8 bits) too small for shift of 9
$ go vet -shift .
vet: flag "-shift" not defined
Run "go help vet" for more information