[postgis-tickets] [PostGIS] #3980: [SFCGAL] Potential access to freed memory

[PostGIS]

#3980: [SFCGAL] Potential access to freed memory
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  Reporter:  lucasvr  |      Owner:  colivier
      Type:  defect   |     Status:  new
  Priority:  medium   |  Milestone:  PostGIS 2.4.3
 Component:  sfcgal   |    Version:  2.4.x
Resolution:           |   Keywords:
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Comment (by lucasvr):

 Sure thing. I am attaching a patch that moves calls to PG_FREE_IF_COPY
 near the end of each function, just to be on the safe side. Note that I've
 included extra calls to PG_FREE_IF_COPY on conditional branches that call
 elog(ERROR). My understanding is that a call to such a function raises an
 exception and aborts the execution of the code underneath, so that extra
 call should the introduction of memory leaks. Please let me know if that's
 not how elog(ERROR) behaves.

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3980#comment:2>
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