From 544a3f376371750d97e1b17d01d4e522946c2f9d Mon Sep 17 00:00:00 2001
From: Julien Dessaux
Date: Sat, 20 Aug 2022 09:25:57 +0200
Subject: Fixed stack duplicate behaviour

---
 src/stack.nim | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/stack.nim b/src/stack.nim
index d6493a3..ef7edf8 100644
--- a/src/stack.nim
+++ b/src/stack.nim
@@ -46,8 +46,8 @@ func Clear*(s: var Stack) =
   s.height = 0
 
 func Duplicate*(s: var Stack) =
-  if s.height > 0:
-    s.Push(s.data[s.height-1])
+  let v = s.Pop()
+  s.PushVector((v, v));
 
 func Swap*(s: var Stack) =
   let a = s.Pop
-- 
cgit v1.2.3