From 52e06ce4f665b737d86fe6ab4d5d896e844d3eda Mon Sep 17 00:00:00 2001
From: Lukas Lalinsky <lukas@lalinsky.com>
Date: Sat, 18 Apr 2026 09:35:28 +0200
Subject: [PATCH 1/2] std.Io.Dir: fix incorrect return types in setFileOwner
 and setTimestampsNow

`setFileOwner` declared `SetOwnerError!void` but its vtable method
returns the wider `SetFileOwnerError!void` (adds `NameTooLong` and
`BadPathName`), so any call through the wrapper fails to compile.

`setTimestampsNow` dispatched to `io.vtable.fileSetTimestamps` with
`(Dir, []const u8, Dir.SetTimestampsOptions)`, but that vtable entry
takes `(File, File.SetTimestampsOptions)`. The intended target is
`dirSetTimestamps`, whose signature matches the call site.
---
 lib/std/Io/Dir.zig | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/std/Io/Dir.zig b/lib/std/Io/Dir.zig
index 68b432c38e..49e6c8e9ef 100644
--- a/lib/std/Io/Dir.zig
+++ b/lib/std/Io/Dir.zig
@@ -1993,7 +1993,7 @@ pub fn setFileOwner(
     owner: ?File.Uid,
     group: ?File.Gid,
     options: SetFileOwnerOptions,
-) SetOwnerError!void {
+) SetFileOwnerError!void {
     return io.vtable.dirSetFileOwner(io.userdata, dir, sub_path, owner, group, options);
 }
 
@@ -2032,7 +2032,7 @@ pub fn setTimestampsNow(
     sub_path: []const u8,
     options: SetTimestampsNowOptions,
 ) SetTimestampsError!void {
-    return io.vtable.fileSetTimestamps(io.userdata, dir, sub_path, .{
+    return io.vtable.dirSetTimestamps(io.userdata, dir, sub_path, .{
         .follow_symlinks = options.follow_symlinks,
         .access_timestamp = .now,
         .modify_timestamp = .now,

From 50f96d2ca161db0e821b4d08baf6bdb9938a5937 Mon Sep 17 00:00:00 2001
From: Andrew Kelley <andrew@ziglang.org>
Date: Sun, 19 Apr 2026 10:08:23 -0700
Subject: [PATCH 2/2] std.Io.Dir: add type checking for those two functions

---
 lib/std/Io/Dir.zig | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/std/Io/Dir.zig b/lib/std/Io/Dir.zig
index 49e6c8e9ef..95388eac78 100644
--- a/lib/std/Io/Dir.zig
+++ b/lib/std/Io/Dir.zig
@@ -2038,3 +2038,8 @@ pub fn setTimestampsNow(
         .modify_timestamp = .now,
     });
 }
+
+test {
+    _ = &setFileOwner;
+    _ = &setTimestampsNow;
+}