From 43795cb1f1d3b15c005532a43f9e47f11acd5476 Mon Sep 17 00:00:00 2001
From: Vladimir Dementyev <dementiev.vm@gmail.com>
Date: Thu, 5 Oct 2017 15:22:57 +0300
Subject: Remove useless mrb_str_modify

---
 src/io.c | 2 --
 1 file changed, 2 deletions(-)

(limited to 'src')

diff --git a/src/io.c b/src/io.c
index 6f52daf4a..8792bb2aa 100644
--- a/src/io.c
+++ b/src/io.c
@@ -631,8 +631,6 @@ mrb_io_sysread(mrb_state *mrb, mrb_value io)
     buf = mrb_str_new(mrb, NULL, maxlen);
   }
 
-  mrb_str_modify(mrb, RSTRING(buf));
-
   if (RSTRING_LEN(buf) != maxlen) {
     buf = mrb_str_resize(mrb, buf, maxlen);
   } else {
-- 
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