Path artifacts for circle annotation under certain render conditions
If we render ann.pdf from #989 (closed) like this
$ pdftoppm -x 123 -y 425 -W 200 -H 200 -f 0 -singlefile -png ./ann.pdf ./circle_annotwe see a spurious line at the bottom of the circle.
If we change the crop box slightly, the spurious line goes away.
$ pdftoppm -x 123 -y 430 -W 200 -H 200 -f 0 -singlefile -png ./ann.pdf ./circle_annot
Reproducible with poppler 0.80.0 and current master. Did not yet investigate further.