PostGIS 2.5 not regressing cleanly in PostgreSQL 9.4

[robe]

Debbie's 9.4 runs are failing on PostGIS 2.5.

This seems to have started after r17528 (that's the last successful run) on Jun 13th. It's hard to tell which commit after caused the issue since it caused other problems with other PostgreSQL versions that were cleaned up by later commits.

failures are below

 ctors .. ok 
 curvetoline .. ok 
 dump .. ok 
 dumppoints .. ok 
 empty .. ok 
 estimatedextent .. failed (diff expected obtained: /var/lib/jenkins/workspace/postgis/tmp/2_5_pg9.4w64/test_41_diff)
-----------------------------------------------------------------------------
--- estimatedextent_expected	2019-06-28 17:30:18.282838964 +0000
+++ /var/lib/jenkins/workspace/postgis/tmp/2_5_pg9.4w64/test_41_out	2019-07-27 17:30:56.923315007 +0000
@@ -6,32 +6,17 @@
 WARNING:  stats for "t.g" do not exist
 #877.2.deprecated|
 WARNING:  stats for "t.g" do not exist
-WARNING:  stats for "t.g" do not exist
-WARNING:  stats for "t.g" do not exist
-WARNING:  stats for "t.g" do not exist
 #877.3||||
 #877.4|-10.15000|20.15000|-50.40000|30.40000
 #877.5|-10.15000|20.15000|-50.40000|30.40000
 WARNING:  stats for "c1.g" do not exist
-WARNING:  stats for "c1.g" do not exist
-WARNING:  stats for "c1.g" do not exist
-WARNING:  stats for "c1.g" do not exist
 #3391.1||||
 WARNING:  stats for "c2.g" do not exist
-WARNING:  stats for "c2.g" do not exist
-WARNING:  stats for "c2.g" do not exist
-WARNING:  stats for "c2.g" do not exist
 #3391.2||||
 WARNING:  stats for "p.g" do not exist
-WARNING:  stats for "p.g" do not exist
-WARNING:  stats for "p.g" do not exist
-WARNING:  stats for "p.g" do not exist
 #3391.3||||
 #3391.4|0.00|1.00|0.00|1.00
 WARNING:  stats for "c2.g" do not exist
-WARNING:  stats for "c2.g" do not exist
-WARNING:  stats for "c2.g" do not exist
-WARNING:  stats for "c2.g" do not exist
 #3391.5||||
 #3391.6|0.00|1.00|0.00|1.00
 #3391.7|0.00|1.00|0.00|1.00
@@ -41,30 +26,15 @@
 #3391.11|-1.00|0.00|-1.00|0.00
 #3391.12|-1.01|2.02|-1.01|2.02
 WARNING:  stats for "p.g" do not exist
-WARNING:  stats for "p.g" do not exist
-WARNING:  stats for "p.g" do not exist
-WARNING:  stats for "p.g" do not exist
 #3391.13||||
 WARNING:  stats for "p.g" do not exist
-WARNING:  stats for "p.g" do not exist
-WARNING:  stats for "p.g" do not exist
-WARNING:  stats for "p.g" do not exist
 #3391.14||||
 WARNING:  stats for "c1.g" do not exist
-WARNING:  stats for "c1.g" do not exist
-WARNING:  stats for "c1.g" do not exist
-WARNING:  stats for "c1.g" do not exist
 #3391.15||||
 WARNING:  stats for "c1.g" do not exist
-WARNING:  stats for "c1.g" do not exist
-WARNING:  stats for "c1.g" do not exist
-WARNING:  stats for "c1.g" do not exist
 #3391.16||||
 #3391.17|0.00|1.00|0.00|1.00
 WARNING:  stats for "p.g" do not exist
-WARNING:  stats for "p.g" do not exist
-WARNING:  stats for "p.g" do not exist
-WARNING:  stats for "p.g" do not exist
 #3391.18||||
 #3391.19|0.00|1.00|0.00|1.00
 #3391.20|0.00|1.00|0.00|1.00
-----------------------------------------------------------------------------
 forcecurve .. ok 
 geography .. ok 
 geometric_median .. ok 
 in_geohash .. ok 
 in_gml .. ok 
 in_kml .. ok 
 in_encodedpolyline .. ok 
 iscollection .. ok 
 legacy .. ok 
 long_xact .. ok 
 lwgeom_regress .. ok 
 measures .. ok 
 minimum_bounding_circle .. ok 
 normalize .. ok 
 operators .. ok 
 orientation .. ok 
 out_geometry .. ok 
 out_geography .. ok 
 polygonize .. ok 
 polyhedralsurface .. ok 
 postgis_type_name .. ok 
 quantize_coordinates .. ok 
 regress .. ok 
 regress_bdpoly .. ok 
 regress_gist_index_nd .. ok 
 regress_index .. ok 
 regress_index_nulls .. ok 
 regress_management .. ok 
 regress_selectivity .. ok 
 regress_lrs .. ok 
 regress_ogc .. ok 
 regress_ogc_cover .. ok 
 regress_ogc_prep .. ok 
 regress_proj .. ok 
 relate .. ok 
 remove_repeated_points .. ok 
 removepoint .. ok 
 reverse .. ok 
 setpoint .. ok 
 simplify .. ok 
 simplifyvw .. ok 
 size .. ok 
 snaptogrid .. ok 
 split .. ok 
 sql-mm-serialize .. ok 
 sql-mm-circularstring .. ok 
 sql-mm-compoundcurve .. ok 
 sql-mm-curvepoly .. ok 
 sql-mm-general .. ok 
 sql-mm-multicurve .. ok 
 sql-mm-multisurface .. ok 
 swapordinates .. ok 
 summary .. ok 
 temporal .. ok 
 tickets .. ok 
 twkb .. ok 
 typmod .. ok 
 wkb .. ok 
 wkt .. ok 
 wmsservers .. ok 
 knn .. ok 
 hausdorff .. ok 
 regress_buffer_params .. ok 
 offsetcurve .. ok 
 relatematch .. ok 
 isvaliddetail .. ok 
 sharedpaths .. ok 
 snap .. ok 
 node .. ok 
 unaryunion .. ok 
 clean .. ok 
 relate_bnr .. ok 
 delaunaytriangles .. ok 
 clipbybox2d .. ok 
 subdivide .. ok 
 voronoi .. ok 
 minimum_clearance .. ok 
 oriented_envelope .. ok 
 in_geojson .. ok 
 mvt .. ok 
 geobuf .. ok 
 mvt_jsonb .. ok 
 regress_sfcgal .. ok 
 sfcgal/empty .. ok 
 sfcgal/geography .. ok 
 sfcgal/legacy .. ok 
 sfcgal/measures .. ok 
 sfcgal/regress_ogc_prep .. ok 
 sfcgal/regress_ogc .. ok 
 sfcgal/regress .. ok 
 sfcgal/tickets .. failed (diff expected obtained: /var/lib/jenkins/workspace/postgis/tmp/2_5_pg9.4w64/test_132_diff)
-----------------------------------------------------------------------------
--- sfcgal/tickets_expected	2019-07-02 09:49:06.918850303 +0000
+++ /var/lib/jenkins/workspace/postgis/tmp/2_5_pg9.4w64/test_132_out	2019-07-27 17:31:52.062722324 +0000
@@ -151,9 +151,6 @@
 WARNING:  stats for "t.g" do not exist
 #877.2.deprecated|
 WARNING:  stats for "t.g" do not exist
-WARNING:  stats for "t.g" do not exist
-WARNING:  stats for "t.g" do not exist
-WARNING:  stats for "t.g" do not exist
 #877.3||||
 #877.4|-10.15000|20.15000|-50.40000|30.40000
 #877.5|-10.15000|20.15000|-50.40000|30.40000
-----------------------------------------------------------------------------
 sfcgal/concave_hull .. ok 
 sfcgal/wmsservers .. ok 
 sfcgal/approximatemedialaxis .. ok 
 uninstall .  /var/lib/jenkins/workspace/postgis/branches/2.5/regress/00-regress-install/share/contrib/postgis/uninstall_sfcgal.sql
  /var/lib/jenkins/workspace/postgis/branches/2.5/regress/00-regress-install/share/contrib/postgis/uninstall_postgis.sql
. ok (4336)

Looks like might just be number of warnings output perhaps because of change of number of runs or something.