[GRASS-dev] [GRASS GIS] #4015: ctypes: TypeError: item 1 in _argtypes_ passes a union by value, which is unsupported

[GRASS GIS]

#4015: ctypes: TypeError: item 1 in _argtypes_ passes a union by value, which is
unsupported
----------------------------+---------------------------------
  Reporter:  neteler        |      Owner:  grass-dev@…
      Type:  defect         |     Status:  new
  Priority:  normal         |  Milestone:  7.8.3
 Component:  Python ctypes  |    Version:  git-releasebranch78
Resolution:                 |   Keywords:  ctypes, python3
       CPU:  Unspecified    |   Platform:  Unspecified
----------------------------+---------------------------------

Comment (by Sylvain POULAIN):

 Hi,

 Don't know if it's related but seems to have same error in archlinux.
 Build is fine but launching g.gui wxpython gives errors : All argtypes in
 gis.py return error.
 Using python 3.8.0 launch grass wxpython succesfully

 {{{
 $ pacman -Q python-wxpython
 python-wxpython 4.0.7-1
 $ pacman -Q python
 python 3.8.1-3
 }}}



 {{{
 $ grass78
 Default locale not found, using UTF-8
 Default locale settings are missing. GRASS running with C locale.
 Starting GRASS GIS...
 Cleaning up temporary files...

           __________  ___   __________    _______________
          / ____/ __ \/   | / ___/ ___/   / ____/  _/ ___/
         / / __/ /_/ / /| | \__ \\_  \   / / __ / / \__ \
        / /_/ / _, _/ ___ |___/ /__/ /  / /_/ // / ___/ /
        \____/_/ |_/_/  |_/____/____/   \____/___//____/

 Welcome to GRASS GIS 7.8.2
 GRASS GIS homepage:                      https://grass.osgeo.org
 This version running through:            Bash Shell (/bin/bash)
 Help is available with the command:      g.manual -i
 See the licence terms with:              g.version -c
 See citation options with:               g.version -x
 If required, restart the GUI with:       g.gui wxpython
 When ready to quit enter:                exit

 Launching <wxpython> GUI in the background, please wait...
 GRASS 7.8.2 (newLocation):~ > Traceback (most recent call last):
   File "/usr/lib/python3.8/ctypes/__init__.py", line 99, in CFUNCTYPE
     return _c_functype_cache[(restype, argtypes, flags)]
 KeyError: (<class 'ctypes.c_int'>, (<class
 'grass.lib.ctypes_preamble.String'>,), 1)

 During handling of the above exception, another exception occurred:

 Traceback (most recent call last):
   File "/opt/grass/gui/wxpython/wxgui.py", line 105, in OnInit
     from lmgr.frame import GMFrame
   File "/opt/grass/gui/wxpython/lmgr/frame.py", line 51, in <module>
     from lmgr.layertree import LayerTree, LMIcons
   File "/opt/grass/gui/wxpython/lmgr/layertree.py", line 38, in <module>
     from mapdisp.frame import MapFrame
   File "/opt/grass/gui/wxpython/mapdisp/frame.py", line 33, in <module>
     from mapdisp.toolbars import MapToolbar, NvizIcons
   File "/opt/grass/gui/wxpython/mapdisp/toolbars.py", line 22, in <module>
     from nviz.main import haveNviz
   File "/opt/grass/gui/wxpython/nviz/main.py", line 24, in <module>
     from nviz import mapwindow
   File "/opt/grass/gui/wxpython/nviz/mapwindow.py", line 42, in <module>
     from nviz.workspace import NvizSettings
   File "/opt/grass/gui/wxpython/nviz/workspace.py", line 23, in <module>
     from nviz import wxnviz
   File "/opt/grass/gui/wxpython/nviz/wxnviz.py", line 51, in <module>
     from grass.lib.gis import *
   File "/opt/grass/etc/python/grass/lib/gis.py", line 552, in <module>
     ('checker', CFUNCTYPE(UNCHECKED(c_int), String)),
   File "/usr/lib/python3.8/ctypes/__init__.py", line 101, in CFUNCTYPE
     class CFunctionType(_CFuncPtr):
 TypeError: item 1 in _argtypes_ passes a union by value, which is
 unsupported.
 OnInit returned false, exiting...
 }}}

-- 
Ticket URL: <https://trac.osgeo.org/grass/ticket/4015#comment:1>
GRASS GIS <https://grass.osgeo.org>