1 files changed, 46 insertions, 0 deletions
diff --git a/test/fixedbugs/issue5704.go b/test/fixedbugs/issue5704.go
new file mode 100644
index 0000000..11b9a93
--- /dev/null
+++ b/test/fixedbugs/issue5704.go
@@ -0,0 +1,46 @@
+// 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.
+
+// Issue 5704: Conversions of empty strings to byte
+// or rune slices return empty but non-nil slices.
+
+package main
+
+type (
+	mystring string
+	mybytes  []byte
+	myrunes  []rune
+)
+
+func checkBytes(s []byte, arg string) {
+	if len(s) != 0 {
+		panic("len(" + arg + ") != 0")
+	}
+	if s == nil {
+		panic(arg + " == nil")
+	}
+}
+
+func checkRunes(s []rune, arg string) {
+	if len(s) != 0 {
+		panic("len(" + arg + ") != 0")
+	}
+	if s == nil {
+		panic(arg + " == nil")
+	}
+}
+
+func main() {
+	checkBytes([]byte(""), `[]byte("")`)
+	checkBytes([]byte(mystring("")), `[]byte(mystring(""))`)
+	checkBytes(mybytes(""), `mybytes("")`)
+	checkBytes(mybytes(mystring("")), `mybytes(mystring(""))`)
+
+	checkRunes([]rune(""), `[]rune("")`)
+	checkRunes([]rune(mystring("")), `[]rune(mystring(""))`)
+	checkRunes(myrunes(""), `myrunes("")`)
+	checkRunes(myrunes(mystring("")), `myrunes(mystring(""))`)
+}