Winnie hanging indefinitely on CUnit GEOS tests

[robe]

 -------------- Dependencies -------------- 
  GEOS config:          /projects/geos/rel-3.8.0devw64gcc48/bin/geos-config
  GEOS version:         3.8.0dev
  GDAL config:          /projects/gdal/rel-2.2.4w64gcc48/bin/gdal-config
  GDAL version:         2.2.4
  SFCGAL config:        /projects/CGAL/rel-sfcgal-1.3.2w64gcc48/bin/sfcgal-config
  SFCGAL version:       1.3.2
  PostgreSQL config:    /projects/postgresql/rel/pg11w64gcc48/bin/pg_config
  PostgreSQL version:   PostgreSQL 11.0
  PROJ4 version:        49
  Libxml2 config:       /projects/libxml/rel-libxml2-2.7.8w64gcc48/bin/xml2-config
  Libxml2 version:      2.7.8
  JSON-C support:       yes
  protobuf-c support:   yes
  PCRE support:         yes
  Perl:                 /bin/perl

Suite: algorithm
  Test: test_lw_segment_side ...passed
  Test: test_lw_segment_intersects ...passed
  Test: test_lwline_crossing_short_lines ...passed
  Test: test_lwline_crossing_long_lines ...passed
  Test: test_lwline_crossing_bugs ...passed
  Test: test_lwpoint_set_ordinate ...passed
  Test: test_lwpoint_get_ordinate ...passed
  Test: test_point_interpolate ...passed
  Test: test_lwline_interpolate_points ...passed
  Test: test_lwline_interpolate_point_3d ...passed
  Test: test_lwline_clip ...passed
  Test: test_lwpoly_clip ...passed
  Test: test_lwtriangle_clip ...passed
  Test: test_lwline_clip_big ...passed
  Test: test_lwmline_clip ...passed
  Test: test_geohash_point ...passed
  Test: test_geohash_precision ...passed
  Test: test_geohash ...passed
  Test: test_geohash_point_as_int ...passed
  Test: test_isclosed ...passed
  Test: test_lwgeom_simplify ...passed
  Test: test_lw_arc_center ...passed
:hangs here forever

I think this might be because I flipped her to GEOS 3.8 testing. pramsey I think is aware of this. I'll flip back to 3.7 and test locally on mine to see if gcc 8.1 has the same issue.

[robe]

In 17124:

Flip back to GEOS 3.7 for winnie to prevent test hanging.
References #4284