golang syntax highlighting bug

test.go

type A struct {
  Hello string
}

test2.go

type B func(i interface{}) (interface{}, error)

type A struct {
  Hello string
}

test3.go

type B func(i interface{}) interface{}

type A struct {
  Hello string
}

test4.go

type B func(i interface{}) error

type A struct {
  Hello string
}

x.go

type B func(i interface{}) (interface{}, error)

// Comment
type A struct {
  Hello string
}

y.go

type B func(i x) (err  error)

// Comment
type A struct {
  Hello string
}