From b244a3d6531b1e67df0877df2083b18ba6e2df06 Mon Sep 17 00:00:00 2001
From: Pavel <kositsyn.pa@phystech.edu>
Date: Fri, 24 Feb 2023 23:10:53 +0400
Subject: [PATCH] add test and fix solution

---
 forth/eval_test.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/forth/eval_test.go b/forth/eval_test.go
index eca76d3..6f20226 100644
--- a/forth/eval_test.go
+++ b/forth/eval_test.go
@@ -244,6 +244,11 @@ var testCases = []testCase{
 		input:       []string{": SWAP DUP Dup dup ;", "1 swap"},
 		expected:    []int{1, 1, 1, 1},
 	},
+	{
+		description: "redefine of builtin after define user function on it",
+		input:       []string{": foo dup ;", ": dup 1 ;", "2 foo"},
+		expected:    []int{2, 2},
+	},
 }
 
 func TestEval(t *testing.T) {