﻿id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
33840	GEOS C Error when creating a geometry on an M1 Mac	Ariel Kaluzhny	nobody	"Getting different flavors of a GEOS C Error whenever I try to create a geometry. `Point` & `LineString` work fine, but `Polygon`, `MultiPoint`, `MultiLineString`, and `MultiPolygon` all fail.

I know the geometry is valid because it can be created via `GEOSGeometry`. Example:

{{{
from django.contrib.gis.geos import Point, Polygon, MultiPoint, MultiPolygon, MultiLineString, LineString
from django.contrib.gis.geos.geometry import GEOSGeometry

poly = GEOSGeometry('POLYGON((4 4, 4 4, 4 4, 4 4))')
poly.coords()
>>> (((4.0, 4.0), (4.0, 4.0), (4.0, 4.0), (4.0, 4.0)),)

poly2 = Polygon(((4, 4), (4, 4), (4, 4), (4, 4)))
>>> GEOSException: Error encountered checking Geometry returned from GEOS C function ""GEOSGeom_createPolygon_r"".

ls1 = LineString((0, 0), (1, 1))
ls2 = LineString((2, 2), (3, 3))
mls = MultiLineString(ls1, ls2)
>>> GEOSException: Error encountered checking Geometry returned from GEOS C function ""GEOSGeom_createCollection_r"".

 MultiPoint(Point(0, 0), Point(1, 1))
>>> GEOSException: Error encountered checking Geometry returned from GEOS C function ""GEOSGeom_createCollection_r"".
}}}

More of the error stack trace below:

{{{
geos/factories.py:18: in <module>
    p = Polygon(
../venv39/lib/python3.9/site-packages/django/contrib/gis/geos/polygon.py:46: in __init__
    polygon = self._create_polygon(n_holes + 1, [ext_ring, *init_holes])
../venv39/lib/python3.9/site-packages/django/contrib/gis/geos/polygon.py:93: in _create_polygon
    return capi.create_polygon(shell, holes_param, c_uint(n_holes))
../venv39/lib/python3.9/site-packages/django/contrib/gis/geos/libgeos.py:152: in __call__
    return self.func(*args)
../venv39/lib/python3.9/site-packages/django/contrib/gis/geos/prototypes/threadsafe.py:47: in __call__
    return self.cfunc(self.thread_context.handle.ptr, *args)
../venv39/lib/python3.9/site-packages/django/contrib/gis/geos/prototypes/errcheck.py:32: in check_geom
    raise GEOSException('Error encountered checking Geometry returned from GEOS C function ""%s"".' % func.__name__)
E   django.contrib.gis.geos.error.GEOSException: Error encountered checking Geometry returned from GEOS C function ""GEOSGeom_createPolygon_r"".
}}}

----

Operating System & other info:

- MacOS Monterey 12.4, M1 chip
- gdal installed via homebrew (3.5.1)
- Python 3.8.12, Django 3.2
- also have geos and proj installed previously as dependencies via homebrew

Have set:
`GDAL_LIBRARY_PATH=""/opt/homebrew/lib/libgdal.dylib""`
`GEOS_LIBRARY_PATH=""/opt/homebrew/lib/libgeos_c.dylib""`

Exact same code is working on an older Mac setup w/ the same environment just fine.

Have also now tried Python 3.9 as well as reinstalling all related brew packages.

"	Bug	closed	GIS	3.2	Normal	duplicate	Geos, M1 Mac		Unreviewed	0	0	0	0	0	0
