cmd/cgo: fix line number in an error message
Fixes #6563.
R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/14870046
diff --git a/misc/cgo/errors/err2.go b/misc/cgo/errors/err2.go
new file mode 100644
index 0000000..0c64ffe
--- /dev/null
+++ b/misc/cgo/errors/err2.go
@@ -0,0 +1,13 @@
+// Copyright 2013 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.
+
+package main
+
+import "C"
+
+func main() {
+ s := ""
+ _ = s
+ C.malloc(s) // ERROR HERE
+}
