// Copyright 2017 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. // Issue 18452: show pos info in undefined name errors package p import ( "C" "fmt" ) func a() { fmt.Println("Hello, world!") C.function_that_does_not_exist() // line 16 C.pi // line 17 }