1 files changed, 27 insertions, 0 deletions
diff --git a/test/fixedbugs/bug442.go b/test/fixedbugs/bug442.go
new file mode 100644
index 0000000..684d54f
--- /dev/null
+++ b/test/fixedbugs/bug442.go
@@ -0,0 +1,27 @@
+// run
+
+// Copyright 2012 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.
+
+// Used to crash generating hash and == functions for struct
+// with leading _ field.  Issue 3607.
+
+package main
+
+type T struct {
+	_ int
+	X interface{}
+	_ string
+	Y float64
+}
+
+func main() {
+	m := map[T]int{}
+	m[T{X: 1, Y: 2}] = 1
+	m[T{X: 2, Y: 3}] = 2
+	m[T{X: 1, Y: 2}] = 3  // overwrites first entry
+	if len(m) != 2 {
+		println("BUG")
+	}
+}