id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
11984,union_() generates self-intersecting polygon,max@…,Barend Gehrels,"I have a program which generates unions of a multipolygon and a ring. Sometimes, I have an identical point in the two shapes. The union_ result is a self-intersecting polygon.

Demo source attached. Output with Boost 1.58 and 1.60:

input multipolygon is valid
input ring is valid
result multipolygon is invalid: Geometry has invalid self-intersections. A self-intersection point was found at (-95, 60); method: t; operations: i/i; segment IDs {source, multi, ring, segment}: {0, 0, -1, 3}/{0, 0, -1, 6}
",Bugs,closed,Boost 1.61.0,geometry,Boost 1.60.0,Problem,fixed,,