From c5ec37a8ab2366c0b2bb638b28de7f05a5efc51a Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Tue, 13 Feb 2018 08:47:33 +0900
Subject: Fixed wrong offset in `pack_x` function; ref #3944

---
 mrbgems/mruby-pack/src/pack.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'mrbgems/mruby-pack/src')

diff --git a/mrbgems/mruby-pack/src/pack.c b/mrbgems/mruby-pack/src/pack.c
index a8e1cb4bb..3afb5b962 100644
--- a/mrbgems/mruby-pack/src/pack.c
+++ b/mrbgems/mruby-pack/src/pack.c
@@ -835,8 +835,8 @@ pack_x(mrb_state *mrb, mrb_value src, mrb_value dst, mrb_int didx, long count, u
 
   if (count < 0) return 0;
   dst = str_len_ensure(mrb, dst, didx + count);
-  for (i = didx; i < count; i++) {
-    RSTRING_PTR(dst)[i] = '\0';
+  for (i = 0; i < count; i++) {
+    RSTRING_PTR(dst)[didx + i] = '\0';
   }
   return count;
 }
-- 
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