psycopg2.errors.ArraySubscriptError: cannot accumulate arrays of different dimensionality

[Zaczero]

JOSM export is borked for this area:
https://budynki.openstreetmap.org.pl/josm_data?filter_by=bbox&layers=buildings_to_import&xmin=16.578997439673998&ymin=50.4842215286819&xmax=16.581572360328096&ymax=50.48498866820512

[2023-08-20 06:42:39,099] ERROR in app: Exception on /josm_data [GET]
Traceback (most recent call last):
  File "/opt/gugik2osm/venv/lib/python3.8/site-packages/flask/app.py", line 1513, in full_dispatch_request
    rv = self.dispatch_request()
  File "/opt/gugik2osm/venv/lib/python3.8/site-packages/flask/app.py", line 1499, in dispatch_request
    return self.ensure_sync(self.view_functions[rule.endpoint])(**req.view_args)
  File "/opt/gugik2osm/venv/lib/python3.8/site-packages/flask_restful/__init__.py", line 467, in wrapper
    resp = resource(*args, **kwargs)
  File "/opt/gugik2osm/venv/lib/python3.8/site-packages/flask/views.py", line 83, in view
    return self.dispatch_request(*args, **kwargs)
  File "/opt/gugik2osm/venv/lib/python3.8/site-packages/flask_restful/__init__.py", line 582, in dispatch_request
    resp = meth(*args, **kwargs)
  File "/opt/gugik2osm/app/resources/internal.py", line 135, in get
    data = objects.layers.select_data_for_layers([(layer, {'geojson_geometry': geojson_geometry_string}) for layer in selected_layers])
  File "/opt/gugik2osm/app/common/objects/layers.py", line 148, in select_data_for_layers
    data[layer.id] = layer.get_data(params)
  File "/opt/gugik2osm/app/common/objects/layers.py", line 27, in get_data
    data = db.data_from_db(self.query, geometry, row_as=dict)
  File "/opt/gugik2osm/app/common/database.py", line 124, in data_from_db
    cur.execute(query, parameters) if parameters else cur.execute(query)
  File "/opt/gugik2osm/venv/lib/python3.8/site-packages/psycopg2/extras.py", line 251, in execute
    return super(RealDictCursor, self).execute(query, vars)
psycopg2.errors.ArraySubscriptError: cannot accumulate arrays of different dimensionality

[Zaczero]

This building is the cause of the issue. Performing exports around it works just fine.

https://budynki.openstreetmap.org.pl/#map=19/50.4846051/16.5802849

[ttomasz]

Manually added the building to the list of excluded objects as a workaround.
Geometry contains some super small second part that messes up encoding.
Leaving example here for reference: https://dbfiddle.uk/Y2qY4oyy but I don't have time implement fix so we'll just stick with the workaround.

[Zaczero]

And here the visualization of the 2 polygons

[ttomasz]

#138