[PostGIS] #5774: st_buffer on valid geometry returns TopologyException

[PostGIS]

#5774: st_buffer on valid geometry returns TopologyException
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  Reporter:  mapcreatorguus  |      Owner:  pramsey
      Type:  defect          |     Status:  new
  Priority:  medium          |  Milestone:  PostGIS GEOS
 Component:  postgis         |    Version:  3.4.x
Resolution:                  |   Keywords:  st_buffer TopologyException
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Comment (by mdavis):

 Replying to [comment:2 pramsey]:
 > Is 'endcap=square join=mitre' really required when negative buffering a
 polygon? I would tend to think the defaults make more sense and that
 endocaps are mostly useful in the context of positive linear buffers.

 The endcap style is not used for buffers of polygons.

 Using a mitre join does make a difference for a negative buffer of a
 polygon - it produces "pointier" convex corners.
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/5774#comment:5>
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