[postgis-tickets] [PostGIS] #3882: Undefined behaviour in zigzag with negative inputs

[PostGIS]

#3882: Undefined behaviour in zigzag with negative inputs
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 Reporter:  Raul Marin  |      Owner:  strk
     Type:  defect      |     Status:  new
 Priority:  medium      |  Milestone:  PostGIS 2.2.6
Component:  liblwgeom   |    Version:  trunk
 Keywords:              |
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 Output from with the sanitizer:

 {{{
 Running test 'test_zigzag' in suite 'varint'.
 varint.c:170:14: runtime error: left shift of negative value -1
 varint.c:175:14: runtime error: left shift of negative value -1
 varint.c:180:14: runtime error: left shift of negative value -127
 }}}

 Fixes in Github's PR: https://github.com/postgis/postgis/pull/153

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3882>
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