[postgis-tickets] [PostGIS] #4990: getfacecontainingpoint fails on i386

[PostGIS]

#4990: getfacecontainingpoint fails on i386
-----------------------------+---------------------------
  Reporter:  Bas Couwenberg  |      Owner:  strk
      Type:  defect          |     Status:  new
  Priority:  medium          |  Milestone:  PostGIS 3.2.0
 Component:  topology        |    Version:  master
Resolution:                  |   Keywords:
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Comment (by strk):

 Ok the weird looking Closest Segment coordinates were also due to bogus
 format string, which was fixed with
 [1baf9cc491087af450abd31e161ffbd81753a51c/git].

 The correct debugging is now:
 {{{
 DEBUG:  [lwgeom_topo.c:lwt_GetFaceContainingPoint:7092] Closest edge is
 26: LINESTRING(4 31,7 31,7 34,4 34,4 31)
 DEBUG:  [lwgeom_topo.c:lwt_GetFaceContainingPoint:7099] Shortest line to
 closest edge 26: LINESTRING(7 31,7.1 31)
 DEBUG:  [lwgeom_topo.c:lwt_GetFaceContainingPoint:7105] Closest point on
 closest edge: POINT(7 31)
 DEBUG:  [lwgeom_topo.c:lwt_GetFaceContainingPoint:7211] Closest point is
 NOT a node
 DEBUG:  [lwgeom_topo.c:lwt_GetFaceContainingPoint:7238] Closest segment on
 edge 26 is 1
 DEBUG:  [lwgeom_topo.c:lwt_GetFaceContainingPoint:7241] Closest segment on
 edge 26 is LINESTRING(7 31, 7 34)
 ERROR:  Closest point is first point of closest segment, unexpectedly
 }}}

 Here's an image of the problem case:

 [[Image(wrongResult.png)]]

 The debugging lines tell us that there's something wrong with reading the
 coordinates of the "closest segment", because segment 0 should be the
 horizontal one (4 31, 7 31), not the vertical one (7 31, 7 34)!

 It's interesting to note that the "closest segment" is now reported to be
 1 instead of 0.
 This may be due to ptarray_closest_segment_2d returning an uint32 as an
 int. Enabling full warnings might really help here..

-- 
Ticket URL: <https://trac.osgeo.org/postgis/ticket/4990#comment:24>
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