"go vet" generates a warning for any call to Error with a string containing %

[gopherbot]

by [email protected]:

I'm using the latest version of go vet from code.google.com/p/go.tools/cmd/vet

What steps will reproduce the problem?
If possible, include a link to a program on play.golang.org.
1. Define a function Error(a, b)
2. Call Error("%", "")
3. See spurious warning from "go vet".

http://play.golang.org/p/m8yVe4vSbB

What is the expected output?
I would not expect a warning in this case.

What do you see instead?
t.go:7: possible formatting directive in Error call

Which version are you using?  (run 'go version')
"go vet" tip

[adg]

Comment 1:

Vet sometimes generates false positives. It's hard to avoid. Assigning to r in case he
thinks something should be done about it, but I suspect this might be WorkingAsIntended.

Owner changed to @robpike.

Status changed to Thinking.

[robpike]

Comment 2:

Working as intended.

Status changed to WorkingAsIntended.

[gopherbot]

Comment 3 by [email protected]:

Understood.