[Gambas-user] [Gambas Bug Tracker] Bug #853: IDE Crash when press the Undo button

[bugtracker at ...3416...]

http://gambaswiki.org/bugtracker/edit?object=BUG.853&from=L21haW4-

Zainudin AHMAD reported a new bug.

Summary
-------

IDE Crash when press the Undo button

Type             : Bug
Priority         : Medium
Gambas version   : 3.8.90 (TRUNK)
Product          : Development Environment


Description
-----------

I get Error message (attach pic-2) : [13] Null object. FForm.SetControlProperty.3808 , when press the Undo button.

Reproduce the bug : (attach pic-1)
- Add DataView into Form
- Press the Undo button

this happens with :
- DataCheckBox
- DataCombo
- DataComboView
- DataControl
- DataView


System information
------------------

[System]
Gambas=3.8.90 r7496
OperatingSystem=Linux
Kernel=3.2.0-88-generic
Architecture=x86
Distribution=Ubuntu 12.04.5 LTS
Desktop=LXDE
Theme=Gtk
Language=en_US.UTF-8
Memory=494M

[Libraries]
Cairo=libcairo.so.2.11000.2
Curl=libcurl.so.4.2.0
DBus=libdbus-1.so.3.5.8
GStreamer=libgstreamer-0.10.so.0.30.0
GStreamer=libgstreamer-1.0.so.0.7.0
GTK+2=libgtk-x11-2.0.so.0.2400.10
GTK+3=libgtk-3.so.0.400.2
OpenGL=libGL.so.96.43.23
Poppler=libpoppler.so.19.0.0
QT4=libQtCore.so.4.8.1
QT5=libQt5Core.so.5.0.2
SDL=libSDL-1.2.so.0.11.3

[Environment]
DBUS_SESSION_BUS_ADDRESS=unix:abstract=/tmp/dbus-xpmvj25V6h,guid=be71a96f9e366390d6245d360000002c
DEFAULTS_PATH=/usr/share/gconf/Lubuntu.default.path
DESKTOP_SESSION=Lubuntu
DISPLAY=:0
GB_GUI=gb.qt4
GDMSESSION=Lubuntu
GNOME_KEYRING_CONTROL=/tmp/keyring-jbkeXd
GNOME_KEYRING_PID=1828
HOME=<home>
LANG=en_US.UTF-8
LOGNAME=<user>
MANDATORY_PATH=/usr/share/gconf/Lubuntu.mandatory.path
PATH=/usr/lib/lightdm/lightdm:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
PWD=<home>
SAL_USE_VCLPLUGIN=gtk
SHELL=/bin/bash
SSH_AGENT_PID=1819
SSH_AUTH_SOCK=/tmp/keyring-jbkeXd/ssh
TZ=:/etc/localtime
USER=<user>
XAUTHORITY=<home>/.Xauthority
XDG_CONFIG_DIRS=/etc/xdg/lubuntu/:/etc/xdg/xdg-Lubuntu:/etc/xdg
XDG_CONFIG_HOME=<home>/.config
XDG_CURRENT_DESKTOP=LXDE
XDG_DATA_DIRS=/etc/xdg/lubuntu:/usr/share/Lubuntu:/usr/local/share/:/usr/share/:/usr/share:/usr/share/gdm:/var/lib/menu-xdg
XDG_MENU_PREFIX=lxde-
XDG_SEAT_PATH=/org/freedesktop/DisplayManager/Seat0
XDG_SESSION_COOKIE=2d9710af0959f6893eb828f100000008-1449091035.731829-1059360993
XDG_SESSION_PATH=/org/freedesktop/DisplayManager/Session0
_LXSESSION_PID=1789