Handle bad actual actions during DND

* src/xterm.c (x_dnd_begin_drag_and_drop): Behave correctly when
the target gives us a bad atom.

1 files changed, 10 insertions, 2 deletions

diff --git a/src/xterm.c b/src/xterm.c
index ab4dcc3841a..4241b4d0d6b 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -9844,10 +9844,18 @@ x_dnd_begin_drag_and_drop (struct frame *f, Time time, Atom xaction,
   if (x_dnd_action != None)
     {
       block_input ();
+      x_catch_errors (FRAME_X_DISPLAY (f));
       atom_name = XGetAtomName (FRAME_X_DISPLAY (f),
                                 x_dnd_action);
-      action = intern (atom_name);
-      XFree (atom_name);
+      x_uncatch_errors ();
+
+      if (atom_name)
+        {
+          action = intern (atom_name);
+          XFree (atom_name);
+        }
+      else
+        action = Qnil;
       unblock_input ();
 
       return action;