https://github.com/nghttp2/nghttp2/pull/2828

From 54a657140d19f3ba2309d7ca26caf43c4a85202b Mon Sep 17 00:00:00 2001
From: Sam James <sam@gentoo.org>
Date: Sun, 9 Aug 2026 19:30:06 +0100
Subject: [PATCH] util: add <fstream> include

This shows up with GCC 17 where some transitive internal includes changed:
it worked by chance before.
---
 src/util.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/util.h b/src/util.h
index 8b7eee9ace..ec16c7f806 100644
--- a/src/util.h
+++ b/src/util.h
@@ -46,6 +46,7 @@
 #include <algorithm>
 #include <memory>
 #include <chrono>
+#include <fstream>
 #include <unordered_map>
 #include <random>
 #include <ranges>