sthen c84d10b6b1 update to ImageMagick-6.9.9-47, seems to fix crashes seen in geo/postgis
build and probably others.

noting here just for the sake of it, my test case reduced to:
convert -size 200x200 xc:none -draw "path 'M 110,190 M 70,40'" tmp0.png
2018-05-24 09:33:42 +00:00
..
2018-05-21 21:12:48 +00:00