From 69b8a07ae01d8debeea710addf8c4a57b1833e2d Mon Sep 17 00:00:00 2001
From: SuchAFuriousDeath <48620541+SuchAFuriousDeath@users.noreply.github.com>
Date: Tue, 24 Feb 2026 15:15:49 +0100
Subject: [PATCH] winit-x11: fix debug mode overflow panic in `set_timestamp`

Fixes #4484
---
 src/changelog/unreleased.md             | 1 +
 src/platform_impl/linux/x11/xdisplay.rs | 4 +---
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/changelog/unreleased.md b/src/changelog/unreleased.md
index 58f0de13d..7cfbe9145 100644
--- a/src/changelog/unreleased.md
+++ b/src/changelog/unreleased.md
@@ -44,3 +44,4 @@ changelog entry.
 
 - On macOS, fixed crash when dragging non-file content onto window.
 - On X11, fix `set_hittest` not working on some window managers.
+- On X11, fix debug mode overflow panic in `set_timestamp`.
diff --git a/src/platform_impl/linux/x11/xdisplay.rs b/src/platform_impl/linux/x11/xdisplay.rs
index 902d0ce4c..79da0d1fa 100644
--- a/src/platform_impl/linux/x11/xdisplay.rs
+++ b/src/platform_impl/linux/x11/xdisplay.rs
@@ -234,9 +234,7 @@ impl XConnection {
         // Store the timestamp in the slot if it's greater than the last one.
         let mut last_timestamp = self.timestamp.load(Ordering::Relaxed);
         loop {
-            let wrapping_sub = |a: xproto::Timestamp, b: xproto::Timestamp| (a as i32) - (b as i32);
-
-            if wrapping_sub(timestamp, last_timestamp) <= 0 {
+            if (timestamp as i32).wrapping_sub(last_timestamp as i32) <= 0 {
                 break;
             }