vm: compare Array by reference in EQUAL

pkg/vm/vm.go

@@ -454,6 +454,12 @@ func (v *VM) execute(ctx *Context, op Instruction) {
 		if a == nil {
 			panic("no second-to-the-top element found")
 		}
+		if ta, ok := a.value.(*ArrayItem); ok {
+			if tb, ok := b.value.(*ArrayItem); ok {
+				v.estack.PushVal(ta == tb)
+				break
+			}
+		}
 		v.estack.PushVal(reflect.DeepEqual(a, b))
 
 	// Bit operations.

pkg/vm/vm_test.go

@@ -405,6 +405,27 @@ func TestEQUALGoodInteger(t *testing.T) {
 	assert.Equal(t, &BoolItem{true}, vm.estack.Pop().value)
 }
 
+func TestEQUALArrayTrue(t *testing.T) {
+	prog := makeProgram(DUP, EQUAL)
+	vm := load(prog)
+	vm.estack.PushVal([]StackItem{})
+	vm.Run()
+	assert.Equal(t, false, vm.state.HasFlag(faultState))
+	assert.Equal(t, 1, vm.estack.Len())
+	assert.Equal(t, &BoolItem{true}, vm.estack.Pop().value)
+}
+
+func TestEQUALArrayFalse(t *testing.T) {
+	prog := makeProgram(EQUAL)
+	vm := load(prog)
+	vm.estack.PushVal([]StackItem{})
+	vm.estack.PushVal([]StackItem{})
+	vm.Run()
+	assert.Equal(t, false, vm.state.HasFlag(faultState))
+	assert.Equal(t, 1, vm.estack.Len())
+	assert.Equal(t, &BoolItem{false}, vm.estack.Pop().value)
+}
+
 func TestNumEqual(t *testing.T) {
 	prog := makeProgram(NUMEQUAL)
 	vm := load(prog)