[Gambas-bugtracker] Bug #2727: When Adding a byte value to a pointer, returns error not pointer

[bugtracker at gambaswiki.org]

http://gambaswiki.org/bugtracker/edit?object=BUG.2727&from=L21haW4-

Brian G reported a new bug.

Summary
-------

When Adding a byte value to a pointer, returns error not pointer

Type             : Bug
Priority         : High
Gambas version   : Master
Product          : Language


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

In accessing system data thru a returned structure often the length of a field is returned as a byte value.

I have found that adding a byte value to a pointer to increment the pointer fail with an error.

`Expecting pointer`

Yet every other type of value may be added to a pointer to increment is.
Should adding an unsigned byte to a pointer actually fail?

The following script creates the error.

#!/usr/bin/env gbs3
' Gambas Script File Created 03/20/2023 09:19:44

dim a as pointer = 0
Dim b as byte = 20
Dim c as integer = 30

try a += b
if error then error "Error adding byte : "; error.text
a += c

print a

Quit 0


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

[System]
Gambas=3.18.90
OperatingSystem=Linux
Distribution=Linux Mint 20.3 Una
Kernel=5.15.0-67-generic
Architecture=x86_64
Cores=8
Memory=13935M
Language=en_US.UTF-8
Desktop=MATE
DesktopResolution=96
DesktopScale=7
WidgetTheme=dexy-color-dark-gtk
Font=FreeSans,10

[Programs]
clang=clang version 10.0.0-4ubuntu1 
gcc=gcc (Ubuntu 9.4.0-1ubuntu1~20.04.1) 9.4.0
git=git version 2.25.1

[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=libSDL-1.2.so.0.11.4
SQLite=libsqlite3.so.0.8.6

[Environment]
CLUTTER_BACKEND=x11
CLUTTER_IM_MODULE=ibus
COMPIZ_CONFIG_PROFILE=mint
DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus
DESKTOP_SESSION=mate
DISPLAY=:0
EDITOR=/usr/bin/nano
GB_GUI=gb.gtk3
GDMSESSION=mate
GDM_LANG=en_US
GIO_LAUNCHED_DESKTOP_FILE_PID=554787
GPG_AGENT_INFO=/run/user/1000/gnupg/S.gpg-agent:0:1
GTK3_MODULES=xapp-gtk3-module
GTK_IM_MODULE=ibus
GTK_MODULES=gail:atk-bridge
GTK_OVERLAY_SCROLLING=0
HOME=<home>
LANG=en_US.UTF-8
LANGUAGE=en_US.UTF-8
LC_ADDRESS=en_US.UTF-8
LC_ALL=en_US.UTF-8
LC_IDENTIFICATION=en_US.UTF-8
LC_MEASUREMENT=en_US.UTF-8
LC_MONETARY=en_US.UTF-8
LC_NAME=en_US.UTF-8
LC_NUMERIC=en_US.UTF-8
LC_PAPER=en_US.UTF-8
LC_TELEPHONE=en_US.UTF-8
LC_TIME=en_US.UTF-8
LIBVIRT_DEFAULT_URI=qemu:///system
LOGNAME=<user>
MATE_DESKTOP_SESSION_ID=this-is-deprecated
PAM_KWALLET5_LOGIN=/run/user/1000/kwallet5.socket
PAPERSIZE=a4
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
PICO_SDK_PATH=<home>/Projects/picomite/pico/pico-sdk
PWD=<home>
QT4_IM_MODULE=ibus
QT_ACCESSIBILITY=1
QT_FONT_DPI=96
QT_IM_MODULE=ibus
QT_LOGGING_RULES=*.debug=false
QT_QPA_PLATFORMTHEME=qt5ct
QT_SCALE_FACTOR=1
SESSION_MANAGER=local/<hostname>:@/tmp/.ICE-unix/2132,unix/<hostname>:/tmp/.ICE-unix/2132
SHELL=/usr/bin/gsh
SHLVL=0
SSH_AGENT_PID=2218
SSH_AUTH_SOCK=/run/user/1000/keyring/ssh
TERM=xterm
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:/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_CLASS=user
XDG_SESSION_DESKTOP=mate
XDG_SESSION_ID=c2
XDG_SESSION_PATH=/org/freedesktop/DisplayManager/Session0
XDG_SESSION_TYPE=x11
XDG_VTNR=7
XMODIFIERS=@im=ibus