Saving project fails when trying to serialize.

[Juan Pablo Caram]

Exception here:

        # Write
        try:
            json.dump(d, f, default=to_dict)
        except:
            App.log.error("[error] File open but failed to write: %s", filename)
            f.close()
            return

[Juan Pablo Caram]

Does not show up in Windows test setup.

[Juan Pablo Caram]

Traceback (most recent call last):
  File "/home/jpcaram/flatcam/FlatCAMApp.py", line 1442, in on_file_saveproject
    self.on_file_saveprojectas()
  File "/home/jpcaram/flatcam/FlatCAMApp.py", line 1482, in on_file_saveprojectas
    self.save_project(filename)
  File "/home/jpcaram/flatcam/FlatCAMApp.py", line 2609, in save_project
    json.dump(d, f, default=to_dict)
  File "/usr/lib/python2.7/dist-packages/simplejson/__init__.py", line 220, in dump
    for chunk in iterable:
  File "/usr/lib/python2.7/dist-packages/simplejson/encoder.py", line 521, in _iterencode
    for chunk in _iterencode_dict(o, _current_indent_level):
  File "/usr/lib/python2.7/dist-packages/simplejson/encoder.py", line 487, in _iterencode_dict
    for chunk in chunks:
  File "/usr/lib/python2.7/dist-packages/simplejson/encoder.py", line 401, in _iterencode_list
    for chunk in chunks:
  File "/usr/lib/python2.7/dist-packages/simplejson/encoder.py", line 487, in _iterencode_dict
    for chunk in chunks:
  File "/usr/lib/python2.7/dist-packages/simplejson/encoder.py", line 401, in _iterencode_list
    for chunk in chunks:
  File "/usr/lib/python2.7/dist-packages/simplejson/encoder.py", line 531, in _iterencode
    o = _default(o)
  File "/home/jpcaram/flatcam/camlib.py", line 2929, in to_dict
    def dict2obj(d):
  File "/usr/local/lib/python2.7/dist-packages/shapely/wkt.py", line 22, in dumps
    return geos.WKTWriter(geos.lgeos, trim=trim, **kw).write(ob)
  File "/usr/local/lib/python2.7/dist-packages/shapely/geos.py", line 309, in __init__
    setattr(self, name, applied_settings[name])
  File "/usr/local/lib/python2.7/dist-packages/shapely/geos.py", line 317, in __setattr__
    (self.__class__.__name__, name))
AttributeError: 'WKTWriter' object has no attribute 'trim'

[Juan Pablo Caram]

Problem is gone after upgrading GEOS to 3.4.2 using upgrade_geos.sh.

[Juan Pablo Caram]

Priority lowered as problem has been identified and is external.

[Juan Pablo Caram]

Problem is due to a version of GEOS that is too old (for the latest Shapely). Closing and following on issue #89.