From e807a6efc83f4b8667e1e6e1177d3cc1502045e3 Mon Sep 17 00:00:00 2001
From: Richard Feldman <oss@rtfeldman.com>
Date: Wed, 8 Jul 2026 16:16:28 -0400
Subject: [PATCH] gpui_windows: Give the window-create pointer mutable
 provenance

The WndProc recovers the CreateWindowExW lpParam as
*mut WindowCreateContext and writes through it, but the pointer was
derived from a shared reference, so it lacked mutable provenance.
Derive it from &raw mut instead.
---
 crates/gpui_windows/src/window.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/crates/gpui_windows/src/window.rs b/crates/gpui_windows/src/window.rs
index b9715d4824d..6a5d823c838 100644
--- a/crates/gpui_windows/src/window.rs
+++ b/crates/gpui_windows/src/window.rs
@@ -537,7 +537,10 @@ impl WindowsWindow {
                 parent_hwnd,
                 None,
                 Some(hinstance.into()),
-                Some(&context as *const _ as *const _),
+                // The `WndProc` recovers this as `*mut WindowCreateContext` and writes
+                // through it (setting `inner`), so the pointer must carry mutable
+                // provenance. Derive it from `&raw mut` rather than a shared reference.
+                Some(&raw mut context as *const _),
             )
         };