SegFault for initializing cartopy crs for Southern Hemisphere LambertAzimuthalEqualArea

[mjbrodzik]

Description

Hello, I am trying to initialize a LambertAzimuthalEqualArea centered at the South Pole, but this generates a SegFault and crashes python.

I get this error on Mac OS X (High Sierra, 10.13.5) and Mac OS X (Sierra, 10.12.6).

I believe this may be only be a problem for the Southern hemisphere exactly at the South Pole, because it works correctly if I set it to the North Pole (central_latitude=90.0), and does not seg fault of I try other latitudes in the Southern Hemisphere besides the Pole.

Code to reproduce

(cartopy) $ python
Python 3.6.5 | packaged by conda-forge | (default, Apr  6 2018, 13:44:09) 
[GCC 4.2.1 Compatible Apple LLVM 6.1.0 (clang-602.0.53)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import cartopy.crs as ccrs
>>> e2s = ccrs.LambertAzimuthalEqualArea(central_latitude=-90.0)
IllegalArgumentException: Points of LinearRing do not form a closed linestring
Segmentation fault: 11
$ 

Full environment definition

Operating system

Mac OS X

Cartopy version

cartopy 0.16.0 py36_0 conda-forge

conda list

I am attaching output from my conda list command.  I've made a fresh conda env using the environment recommended at the recent SciPy2018 tutorial.
[cartopy_env.txt](https://github.com/SciTools/cartopy/files/2246495/cartopy_env.txt)

[ajdawson]

Thanks for the report @mjbrodzik, this looks like a problem in the projection class when it defines the boundary, a bug fix will be necessary (see #1100).