[postgis-tickets] [PostGIS] #3880: Undefined behaviour in TYPMOD_GET_SRID

[PostGIS]

#3880: Undefined behaviour in TYPMOD_GET_SRID
------------------------+---------------------------
 Reporter:  Raul Marin  |      Owner:  pramsey
     Type:  defect      |     Status:  new
 Priority:  medium      |  Milestone:  PostGIS 2.2.6
Component:  postgis     |    Version:  trunk
 Keywords:              |
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 Some output examples using undefined behaviour sanitizer:
 {{{
 Running test 'test_typmod_macros' in suite
 'serialization/deserialization'.
 cu_libgeom.c:35:7: runtime error: left shift of 535589632 by 3 places
 cannot be represented in type 'int'
 cu_libgeom.c:45:14: runtime error: left shift of 280871168 by 3 places
 cannot be represented in type 'int'
 }}}

 Basically it's at the mercy of how the compiler/cpu decides to handle the
 shift.

 PR in Github with the fix:  https://github.com/postgis/postgis/pull/152

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3880>
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