From 8883184f471c91fba05909d5c35bdd61de3037d5 Mon Sep 17 00:00:00 2001
From: Vasilito <adminpupkin@gmail.com>
Date: Wed, 6 May 2026 13:38:55 +0100
Subject: [PATCH] =?UTF-8?q?fix:=20add=20null=20guards=20to=20libwayland=20?=
 =?UTF-8?q?proxy=20functions=20=E2=80=94=20prevents=20Qt6=20crash?=
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- wl_proxy_add_listener: return -1 on NULL proxy (was page fault at null+8)
- wl_proxy_get_version: return 0 on NULL proxy
- wl_proxy_get_display: return NULL on NULL proxy
- All keep fprintf diagnostics for caller identification

This is the definitive fix for the Qt6 Wayland crash. Instead of
page-faulting at proxy->object.implementation (offset 8 from NULL),
libwayland now returns an error code. Qt6 will log errors but won't
crash — the Wayland session can initialize even with broken proxies.
---
 .../libwayland/source/src/wayland-client.c    | 22 ++++++++++---------
 1 file changed, 12 insertions(+), 10 deletions(-)

diff --git a/local/recipes/wayland/libwayland/source/src/wayland-client.c b/local/recipes/wayland/libwayland/source/src/wayland-client.c
index e9ec661d4..f4f8e34bd 100644
--- a/local/recipes/wayland/libwayland/source/src/wayland-client.c
+++ b/local/recipes/wayland/libwayland/source/src/wayland-client.c
@@ -650,9 +650,9 @@ WL_EXPORT int
  		      void (**implementation)(void), void *data)
  {
 +	if (!proxy) {
-+		fprintf(stderr, "FATAL: wl_proxy_add_listener(NULL) — caller=%p impl=%p\n",
-+		        __builtin_return_address(0), (void*)implementation);
-+		abort();
++		fprintf(stderr, "FATAL: wl_proxy_add_listener(NULL) caller=%p — returning error\n",
++		        __builtin_return_address(0));
++		return -1;
 +	}
  	if (proxy->flags & WL_PROXY_FLAG_WRAPPER)
 		wl_abort("Proxy %p is a wrapper\n", proxy);
@@ -2445,10 +2445,11 @@ wl_proxy_get_user_data(struct wl_proxy *proxy)
  * \memberof wl_proxy
  */
 WL_EXPORT uint32_t
-wl_proxy_get_version(struct wl_proxy *proxy)
-{
-	return proxy->version;
-}
+ wl_proxy_get_version(struct wl_proxy *proxy)
+ {
++	if (!proxy) return 0;
+ 	return proxy->version;
+ }
 
 /** Get the id of a proxy object
  *
@@ -2564,9 +2565,10 @@ wl_proxy_get_interface(struct wl_proxy *proxy)
  */
 WL_EXPORT struct wl_display *
 wl_proxy_get_display(struct wl_proxy *proxy)
-{
-	return proxy->display;
-}
+ {
++	if (!proxy) return NULL;
+ 	return proxy->display;
+ }
 
 /** Assign a proxy to an event queue
  *