From 29706072677daff31ee2de8afd1a1923bf82aafe Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Tue, 27 Dec 2022 16:10:04 +0900
Subject: [PATCH] mruby-io/io.c (mrb_io_readchar): `RSTRING_PTR(buf)` never be
 `NULL`

---
 mrbgems/mruby-io/src/io.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/mrbgems/mruby-io/src/io.c b/mrbgems/mruby-io/src/io.c
index b1624575f..0d0c7b300 100644
--- a/mrbgems/mruby-io/src/io.c
+++ b/mrbgems/mruby-io/src/io.c
@@ -1509,7 +1509,6 @@ mrb_io_readchar(mrb_state *mrb, mrb_value self)
   buf = mrb_iv_get(mrb, self, MRB_IVSYM(buf));
   mrb_ensure_string_type(mrb, buf);
   mrb_assert(RSTRING_LEN(buf) > 0);
-  mrb_assert(RSTRING_PTR(buf) != NULL);
   mrb_str_modify(mrb, RSTRING(buf));
 #ifdef MRB_UTF8_STRING
   c = RSTRING_PTR(buf)[0];