Merge pull request #102045 from Hilderin/fix-bad-window-error-when-stopping-embedded-game

Fix BadWindow error when stopping embedded game on Linux

platform/linuxbsd/x11/display_server_x11.cpp

@@ -5853,16 +5853,20 @@ Error DisplayServerX11::remove_embedded_process(OS::ProcessID p_pid) {
 	// Handle bad window errors silently because just in case the embedded window was closed.
 	int (*oldHandler)(Display *, XErrorEvent *) = XSetErrorHandler(&bad_window_error_handler);
 
-	// Send the message to gracefully close the window.
-	XEvent ev;
-	memset(&ev, 0, sizeof(ev));
-	ev.xclient.type = ClientMessage;
-	ev.xclient.window = ep->process_window;
-	ev.xclient.message_type = XInternAtom(x11_display, "WM_PROTOCOLS", True);
-	ev.xclient.format = 32;
-	ev.xclient.data.l[0] = XInternAtom(x11_display, "WM_DELETE_WINDOW", False);
-	ev.xclient.data.l[1] = CurrentTime;
-	XSendEvent(x11_display, ep->process_window, False, NoEventMask, &ev);
+	// Check if the window is still valid.
+	XWindowAttributes attr;
+	if (XGetWindowAttributes(x11_display, ep->process_window, &attr)) {
+		// Send the message to gracefully close the window.
+		XEvent ev;
+		memset(&ev, 0, sizeof(ev));
+		ev.xclient.type = ClientMessage;
+		ev.xclient.window = ep->process_window;
+		ev.xclient.message_type = XInternAtom(x11_display, "WM_PROTOCOLS", True);
+		ev.xclient.format = 32;
+		ev.xclient.data.l[0] = XInternAtom(x11_display, "WM_DELETE_WINDOW", False);
+		ev.xclient.data.l[1] = CurrentTime;
+		XSendEvent(x11_display, ep->process_window, False, NoEventMask, &ev);
+	}
 
 	// Restore default error handler.
 	XSetErrorHandler(oldHandler);