From b2b0329d2983230508fa79766c0651e78f30b99f Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Tue, 29 Jun 2021 16:49:16 +0900
Subject: string.rb: `upto` to break when the string length is longer than
 `end`.

---
 mrbgems/mruby-string-ext/mrblib/string.rb | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mrbgems/mruby-string-ext/mrblib/string.rb b/mrbgems/mruby-string-ext/mrblib/string.rb
index 4f533c4cd..2b3071567 100644
--- a/mrbgems/mruby-string-ext/mrblib/string.rb
+++ b/mrbgems/mruby-string-ext/mrblib/string.rb
@@ -457,6 +457,8 @@ class String
       break if exclusive and n == 0
       yield bs
       break if n == 0
+      bsiz = bs.size
+      break if bsiz > max.size || bsiz == 0
       bs = bs.succ
     end
     self
-- 
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