[Gambas-bugtracker] Bug #2372: A) ImageView slips below background and B) When the IDE is started with QT5 it crashes during application load

[bugtracker at gambaswiki.org]

http://gambaswiki.org/bugtracker/edit?object=BUG.2372&from=L21haW4-

Claus DIETRICH reported a new bug.

Summary
-------

A) ImageView slips below background and B) When the IDE is started with QT5 it crashes during application load

Type             : Bug
Priority         : Medium
Gambas version   : 3.16
Product          : Unknown


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

The attached bug demo shows the following bugs on the current ppa-stable version of Gambas:

a) Start the app and click on the "Map" button. This will show a worldmap with a day/night terminator (see attached screenshot).
Once you opened the FMap-form in the editor, the day/night terminator will never be shown again. In this case the ImageView1 slips below the worldmap for unknown reasons. Moving it to the foreground with the IDE doesn't help. The only way to make it visible in this case is the raise-function.
Important remark: This bug doesn't occur in the development version of the IDE where the "open bitmap tab" - bug (no. 2212 in the bugtracker) has been fixed recently. 

b) If the IDE is started with "GB_GUI=gb.qt5 GB_GUI_PLATFORM=x11 gambas3" the IDE crashes when loading this app.

Rgds
Claus


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

[System]
Gambas=3.16.3
OperatingSystem=Linux
Kernel=5.4.0-87-generic
Architecture=x86_64
Distribution=Linux Mint 19.3 Tricia
Desktop=MATE
Font=Ubuntu,10
Scale=7
Theme=mint-y
Language=de_DE.UTF-8
Memory=7837M

[Libraries]
Cairo=libcairo.so.2.11510.0
Curl=libcurl.so.4.5.0
DBus=libdbus-1.so.3.19.4
GDK2=libgdk-x11-2.0.so.0.2400.32
GDK3=libgdk-3.so.0.2200.30
GStreamer=libgstreamer-1.0.so.0.1405.0
GTK+2=libgtk-x11-2.0.so.0.2400.32
GTK+3=libgtk-3.so.0.2200.30
OpenGL=libGL.so.1.0.0
Poppler=libpoppler.so.73.0.0
Poppler=libpoppler.so.85.0.0
Poppler=libpoppler.so.90.0.0
QT4=libQtCore.so.4.8.7
QT5=libQt5Core.so.5.9.5
SDL=libSDL-1.2.so.0.11.4
SQLite=libsqlite3.so.0.8.6

[Environment]
CLUTTER_BACKEND=x11
COMPIZ_CONFIG_PROFILE=mate
DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus
DEFAULTS_PATH=/usr/share/gconf/mate.default.path
DESKTOP_SESSION=mate
DISPLAY=:0
GB_GUI=gb.gtk3
GDMSESSION=mate
GDM_LANG=de_DE
GPG_AGENT_INFO=/run/user/1000/gnupg/S.gpg-agent:0:1
GTK_MODULES=gail:atk-bridge
GTK_OVERLAY_SCROLLING=0
HOME=<home>
LANG=de_DE.UTF-8
LANGUAGE=de_DE.UTF-8
LC_ADDRESS=de_DE.UTF-8
LC_ALL=de_DE.UTF-8
LC_IDENTIFICATION=de_DE.UTF-8
LC_MEASUREMENT=de_DE.UTF-8
LC_MONETARY=de_DE.UTF-8
LC_NAME=de_DE.UTF-8
LC_NUMERIC=de_DE.UTF-8
LC_PAPER=de_DE.UTF-8
LC_TELEPHONE=de_DE.UTF-8
LC_TIME=de_DE.UTF-8
LOGNAME=<user>
MANDATORY_PATH=/usr/share/gconf/mate.mandatory.path
MATE_DESKTOP_SESSION_ID=this-is-deprecated
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
PWD=<home>
QT_ACCESSIBILITY=1
QT_AUTO_SCREEN_SCALE_FACTOR=0
QT_LOGGING_RULES=*.debug=false
QT_QPA_PLATFORMTHEME=qt5ct
QT_SCALE_FACTOR=1
SESSION_MANAGER=local/<hostname>:@/tmp/.ICE-unix/1779,unix/<hostname>:/tmp/.ICE-unix/1779
SHELL=/bin/bash
SHLVL=0
SSH_AGENT_PID=2180
SSH_AUTH_SOCK=/run/user/1000/keyring/ssh
TZ=:/etc/localtime
USER=<user>
XAUTHORITY=<home>/.Xauthority
XDG_CONFIG_DIRS=/etc/xdg/xdg-mate:/etc/xdg
XDG_CURRENT_DESKTOP=MATE
XDG_DATA_DIRS=/usr/share/mate:<home>/.local/share/flatpak/exports/share:/var/lib/flatpak/exports/share:/usr/local/share:/usr/share
XDG_GREETER_DATA_DIR=/var/lib/lightdm-data/<user>
XDG_RUNTIME_DIR=/run/user/1000
XDG_SEAT=seat0
XDG_SEAT_PATH=/org/freedesktop/DisplayManager/Seat0
XDG_SESSION_DESKTOP=mate
XDG_SESSION_ID=c1
XDG_SESSION_PATH=/org/freedesktop/DisplayManager/Session0
XDG_SESSION_TYPE=x11
XDG_VTNR=7