From 5342b5cfef8eb0cb4588fb8fac457b83cae7ddf2 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Sat, 10 Apr 2021 19:03:02 +0900
Subject: io.rb: `@buf` should be empty on `EOF`; #4983, #5389

---
 mrbgems/mruby-io/mrblib/io.rb | 2 --
 1 file changed, 2 deletions(-)

diff --git a/mrbgems/mruby-io/mrblib/io.rb b/mrbgems/mruby-io/mrblib/io.rb
index d96bb2b23..6519df9de 100644
--- a/mrbgems/mruby-io/mrblib/io.rb
+++ b/mrbgems/mruby-io/mrblib/io.rb
@@ -295,8 +295,6 @@ class IO
     begin
       readchar
     rescue EOFError
-      c = @buf[0]
-      @buf[0,1]="" if c
       nil
     end
   end
-- 
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