From 5b5a7106c1cdf2d01420de04985f892002e9dd26 Mon Sep 17 00:00:00 2001
From: Anthony De Meulemeester <anthony@academiclabs.co>
Date: Thu, 5 Apr 2018 10:35:33 +0200
Subject: [PATCH] Fix append for bytearrays (#64)

---
 VERSION                  |  2 +-
 pkg/vm/tests/for_test.go | 15 +++++++++++++++
 pkg/vm/vm.go             |  3 +++
 3 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/VERSION b/VERSION
index 4ef2eb086..d2e2400ee 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.39.0
+0.39.1
diff --git a/pkg/vm/tests/for_test.go b/pkg/vm/tests/for_test.go
index 1e17b3d5a..6151d28be 100644
--- a/pkg/vm/tests/for_test.go
+++ b/pkg/vm/tests/for_test.go
@@ -225,6 +225,21 @@ func TestIfUnaryInvert(t *testing.T) {
 	eval(t, src, big.NewInt(0))
 }
 
+func TestAppendByte(t *testing.T) {
+	src := `
+	package foo
+		func Main() []byte {
+			arr := []byte{0x00, 0x01, 0x02}
+			arr = append(arr, 0x03)
+			arr = append(arr, 0x04)
+			arr = append(arr, 0x05)
+			arr = append(arr, 0x06)
+			return arr
+		}
+	`
+	eval(t, src, []uint8{0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06})
+}
+
 func TestAppendString(t *testing.T) {
 	src := `
 	package foo
diff --git a/pkg/vm/vm.go b/pkg/vm/vm.go
index fa197a323..87be7f2ef 100644
--- a/pkg/vm/vm.go
+++ b/pkg/vm/vm.go
@@ -483,6 +483,9 @@ func (v *VM) execute(ctx *Context, op Opcode) {
 			arr := t.Value().([]StackItem)
 			arr = append(arr, itemElem.value)
 			v.estack.PushVal(arr)
+		case *ByteArrayItem:
+			newVal := append(t.value, itemElem.value.Value().([]byte)...)
+			v.estack.PushVal(newVal)
 		default:
 			panic("APPEND: not of underlying type Array")
 		}