[PostGIS] #5589: ST_3DDistance seems not to work for LINESTRINGs in specified situation.

[PostGIS]

#5589: ST_3DDistance seems not to work for LINESTRINGs in specified situation.
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  Reporter:  Wenjing   |      Owner:  pramsey
      Type:  defect    |     Status:  new
  Priority:  critical  |  Milestone:  PostGIS 3.5.0
 Component:  postgis   |    Version:  3.4.x
Resolution:            |   Keywords:
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Comment (by pramsey):

 I also see NULL. So.
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/5589#comment:8>
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