[postgis-tickets] [PostGIS] #3891: Undefined behaviour in pointarray_to_encoded_polyline

[PostGIS]

#3891: Undefined behaviour in pointarray_to_encoded_polyline
------------------------+---------------------------
 Reporter:  Raul Marin  |      Owner:  strk
     Type:  defect      |     Status:  new
 Priority:  low         |  Milestone:  PostGIS 2.2.6
Component:  liblwgeom   |    Version:  trunk
 Keywords:              |
------------------------+---------------------------
 Shifting a negative value is undefined, so I was getting the following
 warning:
 {{{
 $ LD_LIBRARY_PATH=../.libs/  ./.libs/cu_tester
 out_encoded_polyline_test_precision

 Running test 'out_encoded_polyline_test_precision' in suite
 'encoded_polyline_output'.
 lwout_encoded_polyline.c:94:12: runtime error: left shift of negative
 value -250691

     PASSED - asserts -   2 passed,   0 failed,   2 total.
 }}}

 Fix in Github PR: https://github.com/postgis/postgis/pull/155

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3891>
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