From fe6cf851bf1080d1892f777987d2e52962d5f678 Mon Sep 17 00:00:00 2001
From: KOBAYASHI Shuji <shuujii@gmail.com>
Date: Sat, 31 Aug 2019 13:03:30 +0900
Subject: `Array#permutation` with a negative argument should not yield

Before this patch:

  $ bin/mruby -e '[1].permutation(-1){|v| p v}'  #=> [1]

After this patch (same as Ruby):

  $ bin/mruby -e '[1].permutation(-1){|v| p v}'  #=> no output
---
 mrbgems/mruby-array-ext/mrblib/array.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'mrbgems/mruby-array-ext/mrblib/array.rb')

diff --git a/mrbgems/mruby-array-ext/mrblib/array.rb b/mrbgems/mruby-array-ext/mrblib/array.rb
index fef78f83f..fc5d87f2c 100644
--- a/mrbgems/mruby-array-ext/mrblib/array.rb
+++ b/mrbgems/mruby-array-ext/mrblib/array.rb
@@ -819,7 +819,7 @@ class Array
     size = self.size
     if n == 0
       yield []
-    elsif n <= size
+    elsif 0 < n && n <= size
       i = 0
       while i<size
         result = [self[i]]
-- 
cgit v1.2.3