Ctypes issue after importing fiona

[tleeuwenburg]

Platform: OSX 10.11.3 (latest as of 22 Jan 2016)

Simple bash script to reproduce.

conda create -p ./env shapely
source activate env/
pip install fiona
echo "1: Works"
python -c "from shapely.geometry import Point, shape, LineString, mapping"

echo "2: Broken"
python -c "import fiona; from shapely.geometry import mapping"

echo "3: Works again (but prints debug message)"
python -c "import ctypes; ctypes.CDLL('/opt/local/lib/libgeos_c.dylib'); import fiona; from shapely.geometry import mapping"