--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libgo/misc/cgo/test/issue6390.go	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,23 @@
+// 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 cgotest
+
+// #include <stdlib.h>
+import "C"
+
+import "testing"
+
+func test6390(t *testing.T) {
+	p1 := C.malloc(1024)
+	if p1 == nil {
+		t.Fatalf("C.malloc(1024) returned nil")
+	}
+	p2 := C.malloc(0)
+	if p2 == nil {
+		t.Fatalf("C.malloc(0) returned nil")
+	}
+	C.free(p1)
+	C.free(p2)
+}