Errors from attempting to import a function from another
package whose body refers to unexported declarations.

-- go.mod --
module testdata
go 1.12

-- a/a.go --
package a

func A1() { b() }
func b() {}

func A2() { var x T; print(x.f) }
type T struct { f int }

func A3() { _ = &T{f: 0} }

func A4() { _ = &T{0} }

-- b/b.go --
package b

import "testdata/a"

func _() {
	a.A1() //@ inline(re"A1", re`body refers to non-exported b`)
	a.A2() //@ inline(re"A2", re`body refers to non-exported \(testdata/a.T\).f`)
	a.A3() //@ inline(re"A3", re`body refers to non-exported \(testdata/a.T\).f`)
	a.A4() //@ inline(re"A4", re`body refers to non-exported \(testdata/a.T\).f`)
}