[PostGIS] #6067: MacOS CI and winnie failing on topology topogeo_addlinestring, validatetopology

[PostGIS]

#6067: MacOS CI and winnie failing on topology topogeo_addlinestring,
validatetopology
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  Reporter:  robe      |      Owner:  strk
      Type:  defect    |     Status:  reopened
  Priority:  medium    |  Milestone:  PostGIS 3.7.0
 Component:  topology  |    Version:  master
Resolution:            |   Keywords:  robustness
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Comment (by strk):

 libgmp based implementation here:
 https://gitea.osgeo.org/postgis/postgis/pulls/296
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/6067#comment:16>
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