1 files changed, 38 insertions, 0 deletions
diff --git a/src/reflect/nih_test.go b/src/reflect/nih_test.go
new file mode 100644
index 0000000..f503939
--- /dev/null
+++ b/src/reflect/nih_test.go
@@ -0,0 +1,38 @@
+// Copyright 2009 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.
+
+//go:build cgo
+
+package reflect_test
+
+import (
+	. "reflect"
+	"runtime/cgo"
+	"testing"
+	"unsafe"
+)
+
+type nih struct {
+	_ cgo.Incomplete
+	x int
+}
+
+var global_nih = nih{x: 7}
+
+func TestNotInHeapDeref(t *testing.T) {
+	// See issue 48399.
+	v := ValueOf((*nih)(nil))
+	v.Elem()
+	shouldPanic("reflect: call of reflect.Value.Field on zero Value", func() { v.Elem().Field(0) })
+
+	v = ValueOf(&global_nih)
+	if got := v.Elem().Field(1).Int(); got != 7 {
+		t.Fatalf("got %d, want 7", got)
+	}
+
+	v = ValueOf((*nih)(unsafe.Pointer(new(int))))
+	shouldPanic("reflect: reflect.Value.Elem on an invalid notinheap pointer", func() { v.Elem() })
+	shouldPanic("reflect: reflect.Value.Pointer on an invalid notinheap pointer", func() { v.Pointer() })
+	shouldPanic("reflect: reflect.Value.UnsafePointer on an invalid notinheap pointer", func() { v.UnsafePointer() })
+}