ST_ConcaveHull gives ERROR: lwgeom_concavehull: GEOS Error: IllegalArgumentException: Edge length ratio must be in range [0,1]e

[robe]

— this is with the new GEOS implementation

POSTGIS="3.3.0dev 3.2.0-788-g82538c6ea" [EXTENSION] PGSQL="110" GEOS="3.11.0dev-CAPI-1.16.0" SFCGAL="SFCGAL 1.4.1, CGAL 5.3, BOOST 1.78.0" PROJ="7.2.1" LIBXML="2.9.9" LIBJSON="0.12" LIBPROTOBUF="1.2.1" WAGYU="0.5.0 (Internal)"

Example that gives the error:

SELECT ST_ConcaveHull('MULTIPOINT((99.5 68.5),(69 49.5),(106 50.5),(67.5 52),(86.5 58.5),(104 50.5),(70 57),(95 87),(89 114),(103.5 56),(76 61.5),(53.5 59.5),(56 67),(86 123),(89 51.5),(53 60.5),(103.5 59),(58 73.5),(59.5 87),(69.5 57),(91 104.5),(79.5 123),(59 51),(67.5 53),(88 117.5),(79.5 61),(74 124),(98 73.5),(83.5 123.5),(61.5 90.5),(72 124.5),(55.5 71.5),(60 90),(93 49),(99 51),(69 57.5),(90.5 106),(61.5 50),(69 118),(68 52),(65 109),(77.5 99.5),(81.5 77),(81 87.5),(76.5 78),(80 92),(80.5 81),(81 88.5),(75.5 87),(77 100.5))'::geometry, 0.1)

I tried with .1, 0.2, 0.5 also as in the docs and resulted in the same error.

[robe]

For what it's worth, I can generate the same issue with these

DROP TABLE letters;
CREATE TABLE letters(name text PRIMARY KEY, geom geometry);
INSERT INTO letters(name, geom)
SELECT CHR(65 + i) AS name, ST_SnapToGrid(geom,0.5,0.5)
FROM generate_series(0,9) AS i, ST_GeneratePoints(ST_Translate( ST_Buffer(ST_Boundary(ST_Letters(CHR(65 + i))),1),50,50),50,1) AS geom;

SELECT ST_ConcaveHull(geom,0.8)
FROM letters 
WHERE name = 'A'

[robe]

Fixed at [4a3f8597/git]