bencode/fuzz.go | 29 +++++++++++++++++++++++++++++

diff --git a/bencode/fuzz.go b/bencode/fuzz.go
new file mode 100644
index 0000000000000000000000000000000000000000..d075b13e200cc6bb20619b6c05aedd73e1330ef0
--- /dev/null
+++ b/bencode/fuzz.go
@@ -0,0 +1,29 @@
+// +build gofuzz
+
+package bencode
+
+import (
+	"fmt"
+	"reflect"
+)
+
+func Fuzz(b []byte) int {
+	var d interface{}
+	err := Unmarshal(b, &d)
+	if err != nil {
+		return 0
+	}
+	b0, err := Marshal(d)
+	if err != nil {
+		panic(err)
+	}
+	var d0 interface{}
+	err = Unmarshal(b0, &d0)
+	if err != nil {
+		panic(err)
+	}
+	if !reflect.DeepEqual(d, d0) {
+		panic(fmt.Sprintf("%s != %s", d, d0))
+	}
+	return 1
+}