From e6841abad69df4d20e359e0b1c2eb190696ec0c4 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Thu, 27 Sep 2018 21:43:35 +0900
Subject: Fixed a `String#squeeze` bug in handling `iso-8859-1` strings; ref
 #4127

---
 mrbgems/mruby-string-ext/src/string.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'mrbgems/mruby-string-ext/src/string.c')

diff --git a/mrbgems/mruby-string-ext/src/string.c b/mrbgems/mruby-string-ext/src/string.c
index ea8d77249..9e35b18a9 100644
--- a/mrbgems/mruby-string-ext/src/string.c
+++ b/mrbgems/mruby-string-ext/src/string.c
@@ -573,7 +573,7 @@ str_squeeze(mrb_state *mrb, mrb_value str, mrb_value v_pat)
   else {
     for (i=j=0; i<len; i++,j++) {
       if (i>j) s[j] = s[i];
-      if (s[i] == lastch) {
+      if (s[i] >= 0 && s[i] == lastch) {
         flag_changed = TRUE;
         j--;
       }
-- 
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