[geos-devel] GEOS 3.12 regression failure in PostGIS

[Regina Obe]

Hi all,

PostGIS geos310 regression test, detailed here:

https://trac.osgeo.org/postgis/ticket/5260

Started failing around October 18th.

The test is this:
SELECT '#168', ST_NPoints(g), ST_AsText(g), ST_isValidReason(g)
FROM ( VALUES
('01060000C00100000001030000C00100000003000000E3D9107E234F5041A3DB66BC97A30F
4122ACEF440DAF9440FFFFFFFFFFFFEFFFE3D9107E234F5041A3DB66BC97A30F4122ACEF440D
AF9440FFFFFFFFFFFFEFFFE3D9107E234F5041A3DB66BC97A30F4122ACEF440DAF9440FFFFFF
FFFFFFEFFF'::geometry)
) AS v(g);


I'm guessing might be caused by this commit -
https://github.com/libgeos/geos/commit/32348a68c5212c89cfefab46891d2b3aada4a
b40 
which happened around the same time tests started failing.

The difference from prior versions is that the 3.12 (main branch) now emits
for isValidReason one less coordinate

Too few points in geometry component[4275341.96977851 259186.966993061]

Instead of:
Too few points in geometry component[4275341.96977851 259186.966993061
1323.76295828331]


Which to me makes sense if we are only considering 2 dimensions for
validity.

Before I change the test, I want to confirm that this is an intentional
change.

Thanks,
Regina