From 5190926e40febeeb3822b8bd7c031b06279dc3f1 Mon Sep 17 00:00:00 2001
From: Samuel Williams <samuel.williams@oriontransfer.co.nz>
Date: Mon, 15 Nov 2021 15:28:02 +1300
Subject: Validate string type when constructing IO::Buffer for string mapping.

---
 io_buffer.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'io_buffer.c')

diff --git a/io_buffer.c b/io_buffer.c
index 45dbfd02da..bd902ed8d4 100644
--- a/io_buffer.c
+++ b/io_buffer.c
@@ -259,6 +259,8 @@ rb_io_buffer_type_allocate(VALUE self)
 VALUE
 rb_io_buffer_type_for(VALUE klass, VALUE string)
 {
+    StringValue(string);
+
     VALUE instance = rb_io_buffer_type_allocate(klass);
 
     struct rb_io_buffer *data = NULL;
-- 
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