id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
12118	Problems performing boolean operations on polygons with shared edges	ev.mipt@…	Barend Gehrels	"I have described problems with illustrations in mailing list: http://lists.boost.org/geometry/2016/04/3518.php

But forgot to mention there that despite the fact that I use same data every program restart, boost geometry union_ makes described problems not in same places. So WKT representation below is slightly different from pictures in mailing list post.

WKT representations:

Current Path polygon:
MULTIPOLYGON(((13.0894 -70.9842,12.8138 -67.5544,12.6048 -63.5792,13.5644 -54.9161,13.8057 -43.6207,13.0006 -33.8524,9.29665 -33.2341,19.6687 -14.4204,-5.96064 -17.1987,-14.8704 -6.9988,-22.5081 -27.9248,-22.1616 -45.1548,-22.4244 -54.0161,-23.1383 -59.2863,-23.1831 -68.0194,-22.8694 -72.7853,-23.0297 -72.7676,-22.8192 -73.5476,-18.6568 -73.2505,3.16642 -75.6601,12.7528 -76.7187,13.0894 -70.9842)))

Appended polygon:
MULTIPOLYGON(((3.16642 -75.6601,12.7528 -76.7187,12.95 -74.6186,3.16642 -75.6601)),((-22.8477 -78.4296,-20.9284 -78.2253,3.16642 -75.6601,-23.0297 -72.7676,-22.8477 -78.4296)))

Union of current path and appended polygon result:
MULTIPOLYGON(((12.8756 -74.6265,13.0894 -70.9842,12.8138 -67.5544,12.6048 -63.5792,13.5644 -54.9161,13.8057 -43.6207,13.0006 -33.8524,9.29665 -33.2341,19.6687 -14.4204,-5.96064 -17.1987,-14.8704 -6.9988,-22.5081 -27.9248,-22.1616 -45.1548,-22.4244 -54.0161,-23.1383 -59.2863,-23.1831 -68.0194,-22.8694 -72.7853,-23.0297 -72.7676,-22.8477 -78.4296,-20.9284 -78.2253,3.16642 -75.6601,-18.6568 -73.2505,-18.6568 -73.2505,3.16642 -75.6601,12.7528 -76.7187,12.95 -74.6186,12.8756 -74.6265)))"	Bugs	closed	Boost 1.63.0	geometry	Boost 1.60.0	Problem	fixed