[postgis-tickets] [PostGIS] #4018: Add support to unstroke GEOMETRYCOLLECTION

[PostGIS]

#4018: Add support to unstroke GEOMETRYCOLLECTION
-------------------------+---------------------------
 Reporter:  Algunenano   |      Owner:  strk
     Type:  enhancement  |     Status:  new
 Priority:  medium       |  Milestone:  PostGIS 2.5.0
Component:  liblwgeom    |    Version:  trunk
 Keywords:               |
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 Linearizing a `GEOMETRYCOLLECTION` is supported but now the other way
 around. Here is the PR that adds it:
 https://github.com/postgis/postgis/pull/209

 It also forces all clone calls to be `_clone_deep` to memory corruption in
 the tests when some parts of the input and output geometries where shared;
 for example when passed `GEOMETRYCOLLECTION(LINESTRING(10 10,10
 11),LINESTRING(10 11,11 11),LINESTRING(11 11,10 10))`.

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/4018>
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