new dialogs: bug

On a freshly checked out 21.2.35 Use "File -> Exit XEmacs" to exit XEmacs with some buffer unsaved Select "Display Buffer" in the popup dialog Press q to leave the displayed buffer i get: Signaling: (wrong-type-argument framep nil) select-frame(nil) get-dialog-box-response(#<keypress-event q> ("Save file /home/gb/Mail/INBOX? " ("%_Yes" . act) ("%_No" . skip) ("Yes %_All" . automatic) ("No A%_ll" . exit) ("%_Cancel" . quit) ("%_Display Buffer" . [#<compiled-function ... "...(11)" ... 2>]))) map-y-or-n-p(#<compiled-function (buffer) "...(84)" [buffer-modified-p buffer buffer-base-buffer symbol-value-in-buffer save-buffers-skip buffer-file-name exiting buffer-offer-save buffer-size 0 arg t switch-buffer one-window-p delete-other-windows switched switch-to-buffer format "Save file %s? " "Save buffer %s? " buffer-name] 4> #<compiled-function (buffer) "...(8)" [buffer nil (save-buffer) (...)] 3> (#<buffer "*scratch*"> #<buffer "INBOX"> #<buffer " *Minibuf-0*"> #<buffer " *Echo Area*"> #<buffer " *pixmap conversion*"> #<buffer " *Message-Log*"> #<buffer "*Group*"> #<buffer " *Gutter Area*"> #<buffer " *vm-nonexistent-summary*"> #<buffer "INBOX Summary"> #<buffer "*BBDB*"> #<buffer ".bbdb"> #<buffer " *canonical address*"> #<buffer " *extract address components*"> #<buffer " *split*"> #<buffer " *substitute*">) ("buffer" "buffers" "save") ((?\^R #<compiled-function ... "...(11)" ... 2> "%_Display Buffer"))) save-some-buffers-1(nil t t) save-some-buffers(nil t) save-buffers-kill-emacs(nil) call-interactively(save-buffers-kill-emacs)