[Gambas-bugtracker] Bug #1398: accessing sub in where the sub have optional parameter make jit crash

[bugtracker at gambaswiki.org]

http://gambaswiki.org/bugtracker/edit?object=BUG.1398&from=L21haW4-

Zainudin AHMAD reported a new bug.

Summary
-------

accessing sub in where the sub have optional parameter make jit crash

Type             : Bug
Priority         : Low
Gambas version   : Master
Product          : JIT compiler


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

this have two issue 

1) sText value = Null

2) Segfault

It's seems related each other,Code (attach pic):

SubTest(2324, "hola")

Private Sub SubTest(iVal As Integer, Optional sText As String = "")

  If iVal = 2324 Then Test.Pass Else Test.Fail
  If sText = "hola" Then Test.Pass Else Test.Fail

End

Reproduce the bug:
1)Open the project(attach project)
2) Run


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

[System]
Gambas=3.11.90 6d35875 (master)
OperatingSystem=Linux
Kernel=4.13.0-32-generic
Architecture=x86_64
Distribution=Ubuntu 16.04.4 LTS
Desktop=XFCE
Theme=Gtk
Language=en_US.UTF-8
Memory=1740M

[Libraries]
Cairo=libcairo.so.2.11400.6
Curl=libcurl.so.4.4.0
DBus=libdbus-1.so.3.14.6
GStreamer=libgstreamer-0.10.so.0.30.0
GStreamer=libgstreamer-1.0.so.0.803.0
GTK+2=libgtk-x11-2.0.so.0.2400.30
GTK+3=libgtk-3.so.0.1800.9
OpenGL=libGL.so.1.2.0
Poppler=libpoppler.so.58.0.0
QT4=libQtCore.so.4.8.7
QT5=libQt5Core.so.5.5.1
SDL=libSDL-1.2.so.0.11.4
SQLite=libsqlite3.so.0.8.6

[Environment]
CLUTTER_BACKEND=x11
CLUTTER_IM_MODULE=
DBUS_SESSION_BUS_ADDRESS=unix:abstract=/tmp/dbus-0JvAHUIzVT
DEFAULTS_PATH=/usr/share/gconf/xubuntu.default.path
DESKTOP_SESSION=xubuntu
DISPLAY=:0.0
GB_GUI=gb.qt4
GDMSESSION=xubuntu
GDM_LANG=en_US
GLADE_CATALOG_PATH=:
GLADE_MODULE_PATH=:
GLADE_PIXMAP_PATH=:
GNOME_KEYRING_CONTROL=
GNOME_KEYRING_PID=
GPG_AGENT_INFO=<home>/.gnupg/S.gpg-agent:0:1
GTK_IM_MODULE=
GTK_OVERLAY_SCROLLING=0
HOME=<home>
IM_CONFIG_PHASE=1
INSTANCE=
JOB=dbus
LANG=en_US.UTF-8
LANGUAGE=en_US
LC_ADDRESS=id_ID.UTF-8
LC_IDENTIFICATION=id_ID.UTF-8
LC_MEASUREMENT=id_ID.UTF-8
LC_MONETARY=id_ID.UTF-8
LC_NAME=id_ID.UTF-8
LC_NUMERIC=id_ID.UTF-8
LC_PAPER=id_ID.UTF-8
LC_TELEPHONE=id_ID.UTF-8
LC_TIME=id_ID.UTF-8
LOGNAME=<user>
MANDATORY_PATH=/usr/share/gconf/xubuntu.mandatory.path
PATH=<home>/bin:<home>/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
PWD=<home>
QT4_IM_MODULE=
QT_ACCESSIBILITY=1
QT_IM_MODULE=compose
QT_LINUX_ACCESSIBILITY_ALWAYS_ON=1
QT_STYLE_OVERRIDE=gtk
SESSION=xubuntu
SESSIONTYPE=
SESSION_MANAGER=local/<hostname>:@/tmp/.ICE-unix/1438,unix/<hostname>:/tmp/.ICE-unix/1438
SHELL=/bin/bash
SHLVL=0
SSH_AUTH_SOCK=/run/user/1000/keyring/ssh
TZ=:/etc/localtime
UPSTART_EVENTS=started xsession
UPSTART_INSTANCE=
UPSTART_JOB=startxfce4
UPSTART_SESSION=unix:abstract=/com/ubuntu/upstart-session/1000/1259
USER=<user>
XAUTHORITY=<home>/.Xauthority
XDG_CONFIG_DIRS=/etc/xdg/xdg-xubuntu:/usr/share/upstart/xdg:/etc/xdg:/etc/xdg
XDG_CURRENT_DESKTOP=XFCE
XDG_DATA_DIRS=/usr/share/xubuntu:/usr/share/xfce4:<home>/.local/share/flatpak/exports/share:/var/lib/flatpak/exports/share:/usr/local/share:/usr/share:/var/lib/snapd/desktop:/var/lib/snapd/desktop:/usr/share
XDG_GREETER_DATA_DIR=/var/lib/lightdm-data/<user>
XDG_MENU_PREFIX=xfce-
XDG_RUNTIME_DIR=/run/user/1000
XDG_SEAT=seat0
XDG_SEAT_PATH=/org/freedesktop/DisplayManager/Seat0
XDG_SESSION_DESKTOP=xubuntu
XDG_SESSION_ID=c2
XDG_SESSION_PATH=/org/freedesktop/DisplayManager/Session0
XDG_SESSION_TYPE=x11
XDG_VTNR=7
XMODIFIERS=