diff --git a/.vs/ProjectSettings.json b/.vs/ProjectSettings.json
new file mode 100644
index 0000000..f8b4888
--- /dev/null
+++ b/.vs/ProjectSettings.json
@@ -0,0 +1,3 @@
+{
+  "CurrentProjectSetting": null
+}
\ No newline at end of file
diff --git a/.vs/VSWorkspaceState.json b/.vs/VSWorkspaceState.json
new file mode 100644
index 0000000..6b61141
--- /dev/null
+++ b/.vs/VSWorkspaceState.json
@@ -0,0 +1,6 @@
+{
+  "ExpandedNodes": [
+    ""
+  ],
+  "PreviewInSolutionExplorer": false
+}
\ No newline at end of file
diff --git a/.vs/functional-javascript/v15/.suo b/.vs/functional-javascript/v15/.suo
new file mode 100644
index 0000000..5c9a22a
Binary files /dev/null and b/.vs/functional-javascript/v15/.suo differ
diff --git a/.vs/slnx.sqlite b/.vs/slnx.sqlite
new file mode 100644
index 0000000..90f28e4
Binary files /dev/null and b/.vs/slnx.sqlite differ
diff --git a/lib/index.js b/lib/index.js
index 9f9f74f..a8a288e 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -281,7 +281,7 @@ const delay = () => {
 
 const dropRight = (n = 0, arr) => {
   if (n === 0) return arr;
-  const droppedArr = arr;
+  const droppedArr = [ ...arr ];
   return dropRight(n - 1, slice(0, droppedArr.length - 1, droppedArr));
 };