From 2953db58c75f30912bee6b91fd5ff087bbb8cad5 Mon Sep 17 00:00:00 2001
From: ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
Date: Sat, 5 Aug 2023 12:09:13 +0200
Subject: Let FLTK give more detailed description of a Wayland fatal error

Wayland protocol error messages now give the protocol name and the error code.
---
 src/drivers/Wayland/Fl_Wayland_Screen_Driver.cxx | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

(limited to 'src/drivers')

diff --git a/src/drivers/Wayland/Fl_Wayland_Screen_Driver.cxx b/src/drivers/Wayland/Fl_Wayland_Screen_Driver.cxx
index de7bd92c9..0df7ab07b 100644
--- a/src/drivers/Wayland/Fl_Wayland_Screen_Driver.cxx
+++ b/src/drivers/Wayland/Fl_Wayland_Screen_Driver.cxx
@@ -1169,8 +1169,15 @@ static void wayland_socket_callback(int fd, struct wl_display *display) {
   struct pollfd fds = (struct pollfd) { fd, POLLIN, 0 };
   do {
     if (wl_display_dispatch(display) == -1) {
-      Fl::fatal("Fatal error while communicating with the Wayland server: %s",
-                strerror(errno));
+      int err = wl_display_get_error(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);
+      } else {
+        Fl::fatal("Fatal error while communicating with the Wayland server: %s",
+                  strerror(errno));
+      }
     }
   }
   while (poll(&fds, 1, 0) > 0);
-- 
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