bitwise operation with value 0 fails with "Invalid bitwise operation"

Binary package hint: gcalctool

In programming mode:

Bitwise operations AND/OR/XOR all fail with "Invalid bitwise operation" if one of the operands is 0

XNOR exhibits the following behavior using decimal and 16 bit operand:
1 XNOR 0 returns 65534
0 XNOR 1 returns "Invalid bitwise operation"

This appears to be the case regardless of base used or operand size

Haven't tested the NOT operator

ProblemType: Bug
Architecture: i386
Date: Sun Dec 13 11:17:27 2009
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/bin/gcalctool
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
NonfreeKernelModules: nvidia
Package: gcalctool 5.28.1-0ubuntu1
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_CA.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-16.53-genusername
SourcePackage: gcalctool
Uname: Linux 2.6.31-16-generic i686
XsessionErrors:
 (gnome-settings-daemon:1912): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed
 (nautilus:2001): Eel-CRITICAL **: eel_preferences_get_boolean: assertion `preferences_is_initialized ()' failed
 (polkit-gnome-authentication-agent-1:2025): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed
 (gnome-panel:2000): Gdk-WARNING **: /build/buildd/gtk+2.0-2.18.3/gdk/x11/gdkdrawable-x11.c:952 drawable is not a pixmap or window
 (gnome-panel:2000): Gtk-WARNING **: gtk_widget_size_allocate(): attempt to allocate widget with width -4 and height 24