From: Po Lu <luangruo@yahoo.com>
Date: Mon, 17 Feb 2025 02:56:37 +0000 (+0800)
Subject: * src/pgtkterm.c (pgtk_enumerate_devices): Circumvent bug#76239.
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=e432786b1af921a9e8ac3f858fb11469574307e3;p=emacs.git

* src/pgtkterm.c (pgtk_enumerate_devices): Circumvent bug#76239.

(cherry picked from commit e34ea5db5f1c09582e3779828ba248eec5769eb2)
---

diff --git a/src/pgtkterm.c b/src/pgtkterm.c
index d47b1da7262..6840340dec6 100644
--- a/src/pgtkterm.c
+++ b/src/pgtkterm.c
@@ -184,11 +184,27 @@ pgtk_enumerate_devices (struct pgtk_display_info *dpyinfo,
 	{
 	  rec = xmalloc (sizeof *rec);
 	  rec->seat = g_object_ref (seat);
-	  rec->device = GDK_DEVICE (t1->data);
-	  rec->name = (make_formatted_string
-		       ("%u:%s",
+
+	  if (t1->data)
+	    {
+	      rec->device = GDK_DEVICE (t1->data);
+	      snprintf (printbuf, 1026, "%u:%s",
 			gdk_device_get_source (rec->device),
-			gdk_device_get_name (rec->device)));
+			gdk_device_get_name (rec->device));
+
+	      rec->name = build_string (printbuf);
+	    }
+	  else
+	    {
+	      /* GTK bug 7737 results in GDK seats being initialized
+		 with NULL devices in some cirumstances.  As events will
+		 presumably also be delivered with their device fields
+		 set to NULL, insert a ersatz device record associated
+		 with NULL.  (bug#76239) */
+	      rec->device = NULL;
+	      rec->name = build_string ("0:unknown device");
+	    }
+
 	  rec->next = dpyinfo->devices;
 	  dpyinfo->devices = rec;
 	}