[Gambas-bugtracker] Bug #2864: New Gambas 3.19 flickers and destroyed theme

[bugtracker at gambaswiki.org]

http://gambaswiki.org/bugtracker/edit?object=BUG.2864&from=L21haW4-

Christof THALHOFER reported a new bug.

Summary
-------

New Gambas 3.19 flickers and destroyed theme

Type             : Bug
Priority         : Medium
Gambas version   : Master
Product          : Unknown


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

Hello, the appearance of the Gamba IDE on my system is massively disturbed. It also flickers. None of that happened with 3.18. Attached a video.


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

[System]
Gambas=3.19
OperatingSystem=Linux
Distribution=Ubuntu 20.04.6 LTS
Kernel=5.4.0-171-generic
Architecture=x86_64
Cores=8
Memory=15442M
Language=de_DE.UTF-8
Desktop=XFCE
DesktopResolution=96
DesktopScale=7
WidgetTheme=breeze
Font=DejaVu Sans,10
[Programs]
dpkg=Debian »dpkg« Paketmanagement-Programm Version 1.19.7 (amd64).
gcc=gcc (Ubuntu 9.4.0-1ubuntu1~20.04.2) 9.4.0
git=git version 2.25.1
msgmerge=msgmerge (GNU gettext-tools) 0.19.8.1
rpmbuild=RPM version 4.14.2.1
[Libraries]
Cairo=libcairo.so.2.11600.0
Curl=libcurl.so.4.6.0
DBus=libdbus-1.so.3.19.11
GDK2=libgdk-x11-2.0.so.0.2400.32
GDK3=libgdk-3.so.0.2404.16
GStreamer=libgstreamer-1.0.so.0.1603.0
GTK+2=libgtk-x11-2.0.so.0.2400.32
GTK+3=libgtk-3.so.0.2404.16
OpenGL=libGL.so.1.7.0
Poppler=libpoppler.so.97.0.0
QT5=libQt5Core.so.5.12.8
RSvg=librsvg-2.so.2.47.0
SDL=libSDL2-2.0.so.0.10.0
SQLite 3=libsqlite3.so.0.8.6
[Environment]
CLUTTER_IM_MODULE=xim
DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus
DEFAULTS_PATH=/usr/share/gconf/xfce.default.path
DESKTOP_SESSION=xfce
DISPLAY=:0.0
EDITOR=mousepad
GB_GUI=gb.gtk3
GDMSESSION=xfce
GTK_IM_MODULE=xim
GTK_MODULES=canberra-gtk-module:canberra-gtk-module
HOME=<home>
LANG=de_DE.UTF-8
LC_ALL=de_DE.UTF-8
LIBVIRT_DEFAULT_URI=qemu:///system
LOGNAME=<user>
MANDATORY_PATH=/usr/share/gconf/xfce.mandatory.path
PANEL_GDK_CORE_DEVICE_EVENTS=0
PATH=<home>/.local/bin:<home>/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/snap/bin
PWD=<home>
QT4_IM_MODULE=xim
QT_ACCESSIBILITY=1
QT_LOGGING_RULES=*.debug=false
QT_QPA_PLATFORMTHEME=appmenu-qt5
SESSION_MANAGER=local/<hostname>:@/tmp/.ICE-unix/4014,unix/<hostname>:/tmp/.ICE-unix/4014
SHELL=/usr/bin/zsh
SHLVL=0
SSH_AGENT_PID=4161
SSH_AUTH_SOCK=/tmp/ssh-LLKTXJm2nNtj/agent.4014
TZ=:/etc/localtime
USER=<user>
USERNAME=<user>
WINDOWPATH=2
XAUTHORITY=/run/user/1000/gdm/Xauthority
XDG_CONFIG_DIRS=/etc/xdg/xdg-xfce:/etc/xdg:/etc/xdg
XDG_CURRENT_DESKTOP=XFCE
XDG_DATA_DIRS=/usr/share/xfce4:/usr/share/xfce:/usr/local/share/:/usr/share/:/var/lib/snapd/desktop:/var/lib/snapd/desktop:/usr/share
XDG_MENU_PREFIX=xfce-
XDG_RUNTIME_DIR=/run/user/1000
XDG_SEAT=seat0
XDG_SESSION_CLASS=user
XDG_SESSION_DESKTOP=xfce
XDG_SESSION_ID=1
XDG_SESSION_TYPE=x11
XDG_VTNR=2
XMODIFIERS=@im=none