diff --git a/vlib/builtin/array.v b/vlib/builtin/array.v
index d920f7b454..d892a9ca5a 100644
--- a/vlib/builtin/array.v
+++ b/vlib/builtin/array.v
@@ -214,6 +214,27 @@ fn (a array) slice2(start, _end int, end_max bool) array {
 // the `end` element of the original array with the length and capacity
 // set to the number of the elements in the slice.
 fn (a array) slice(start, _end int) array {
+	mut end := _end
+	if start > end {
+		panic('array.slice: invalid slice index ($start > $end)')
+	}
+	if end > a.len {
+		panic('array.slice: slice bounds out of range ($end >= $a.len)')
+	}
+	if start < 0 {
+		panic('array.slice: slice bounds out of range ($start < 0)')
+	}
+	l := end - start
+	res := array {
+		element_size: a.element_size
+		data: a.data + start * a.element_size
+		len: l
+		cap: l
+	}
+	return res
+}
+
+fn (a array) slice_clone(start, _end int) array {
 	mut end := _end
 	if start > end {
 		panic('array.slice: invalid slice index ($start > $end)')