From 0e6c61e6fccd57cea491e1c3f8019cea4ae942b3 Mon Sep 17 00:00:00 2001
From: ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
Date: Thu, 7 Aug 2025 19:37:05 +0200
Subject: Wayland: avoid NULL-pointer error after call to
 wl_display_get_protocol_error()

---
 src/drivers/Wayland/Fl_Wayland_Screen_Driver.cxx | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/drivers/Wayland/Fl_Wayland_Screen_Driver.cxx b/src/drivers/Wayland/Fl_Wayland_Screen_Driver.cxx
index 1d1f4f10a..ec5faefc7 100644
--- a/src/drivers/Wayland/Fl_Wayland_Screen_Driver.cxx
+++ b/src/drivers/Wayland/Fl_Wayland_Screen_Driver.cxx
@@ -1355,7 +1355,8 @@ static void wayland_socket_callback(int fd, struct wl_display *display) {
       if (err == EPROTO) {
         const struct wl_interface *interface;
         int code = wl_display_get_protocol_error(display, &interface, NULL);
-        Fl::fatal("Fatal error no %d in Wayland protocol: %s", code, interface->name);
+        Fl::fatal("Fatal error no %d in Wayland protocol: %s", code,
+                  (interface ? interface->name : "unknown") );
       } else {
         Fl::fatal("Fatal error while communicating with the Wayland server: %s",
                   strerror(errno));
-- 
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