From 0d8d799ad3ec4d7f99bab18540478b68b5a50cd7 Mon Sep 17 00:00:00 2001
From: Thomas <hakerh403@gmail.com>
Date: Sun, 24 Jan 2021 11:31:12 +0100
Subject: [PATCH] commit

---
 package.json           | 2 +-
 src/langs/129/ctors.js | 9 +++++++--
 src/langs/129/index.js | 4 ++--
 3 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/package.json b/package.json
index 82f7ffd..1031414 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@hakerh400/esolangs",
   "description": "Collection of interpreters for esoteric programming languages",
-  "version": "1.3.1",
+  "version": "1.3.2",
   "author": "Thomas <hakerh403@gmail.com>",
   "main": "index.js",
   "contributors": [],
diff --git a/src/langs/129/ctors.js b/src/langs/129/ctors.js
index 5566107..ea70f5d 100644
--- a/src/langs/129/ctors.js
+++ b/src/langs/129/ctors.js
@@ -64,8 +64,13 @@ class Stack extends Base{
     return this.elems.shift();
   }
 
-  dup(){
-    return new Stack(this.elems);
+  *dup(){
+    const stack = new Stack();
+
+    for(const elem of this.elems)
+      stack.push(yield [[elem, 'dup']]);
+
+    return stack.rev();
   }
 
   get int(){ return this.len; }
diff --git a/src/langs/129/index.js b/src/langs/129/index.js
index 93d667e..3bedef0 100644
--- a/src/langs/129/index.js
+++ b/src/langs/129/index.js
@@ -50,7 +50,7 @@ const run = (src, input) => {
       halt = 1;
       return;
     }
-    
+
     output.push(byte);
   };
 
@@ -84,7 +84,7 @@ const run = (src, input) => {
           if(DEBUG) log('Duplicate');
           const s = mainStack.top();
           if(!check(s)) return;
-          mainStack.push(s.dup());
+          mainStack.push(O.rec([s, 'dup']));
         } break;
 
         case '((()(()))())': {