From d6564615e7aad09348b6bb933f787ee30916971e Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Wed, 24 Apr 2024 17:14:11 +0900
Subject: [PATCH] Fix format specifier for `DWORD`

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

diff --git a/io_buffer.c b/io_buffer.c
index 7715aa0d37..af884f1473 100644
--- a/io_buffer.c
+++ b/io_buffer.c
@@ -260,7 +260,7 @@ io_buffer_free(struct rb_io_buffer *buffer)
     if (buffer->mapping) {
         if (RB_IO_BUFFER_DEBUG) fprintf(stderr, "io_buffer_free:CloseHandle -> %p\n", buffer->mapping);
         if (!CloseHandle(buffer->mapping)) {
-            fprintf(stderr, "io_buffer_free:GetLastError -> %d\n", GetLastError());
+            fprintf(stderr, "io_buffer_free:GetLastError -> %lu\n", GetLastError());
         }
         buffer->mapping = NULL;
     }