Missing a few cases?

[ahmetb]

It misses the following cases:

	v, _ := foo() // <------- did not use err here
	a, b, err := bar()
	if err != nil {
		...
	}

or

	v, err := foo() // <------ err is overwritten before used
	a, b, err := bar()
	if err != nil {
		...
	}

Is this by design?

[dominikh]

The first one is on purpose, and you can use the -blank flag to flag errors assigned to _. The second one is #7

[ahmetb]

Great, thanks @dominikh.