From 377a8b2a3b408dad4392a97254a7a6bb2d06b200 Mon Sep 17 00:00:00 2001
From: database64128 <free122448@hotmail.com>
Date: Mon, 25 Aug 2025 16:02:24 +0800
Subject: [PATCH] std.net.Ip6Address: format numerical scope id

---
 lib/std/net.zig      | 3 +++
 lib/std/net/test.zig | 2 +-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/std/net.zig b/lib/std/net.zig
index 083bda85d5..37fe2734d5 100644
--- a/lib/std/net.zig
+++ b/lib/std/net.zig
@@ -747,6 +747,9 @@ pub const Ip6Address = extern struct {
                 try w.writeAll(":");
             }
         }
+        if (self.sa.scope_id != 0) {
+            try w.print("%{}", .{self.sa.scope_id});
+        }
         try w.print("]:{}", .{port});
     }
 
diff --git a/lib/std/net/test.zig b/lib/std/net/test.zig
index a7e6b465cb..bfafbe6044 100644
--- a/lib/std/net/test.zig
+++ b/lib/std/net/test.zig
@@ -73,7 +73,7 @@ test "parse and render IPv6 addresses" {
         "2001:db8::",
         "::1234:5678",
         "2001:db8::1234:5678",
-        "ff01::fb",
+        "ff01::fb%1234",
         "::ffff:123.5.123.5",
     };
     for (ips, 0..) |ip, i| {