The following bug has been logged on the website:
Bug reference: 18835
Logged by: Alexander Lakhin
Email address: exclusion(at)gmail(dot)com
PostgreSQL version: 17.4
Operating system: Ubuntu 24.04
Description:
The following script:
CREATE TABLE t(p point);
INSERT INTO t SELECT point(g, g) FROM generate_series(1, 1000) g;
INSERT INTO t VALUES ('(0,NaN)'::point);
CREATE INDEX spgist_idx ON t USING spgist(p);
triggers:
ERROR: XX000: getQuadrant: impossible case
LOCATION: getQuadrant, spgquadtreeproc.c:77
Reproduced starting from 8daeb5ddd.
This anomaly is discovered with SQLsmith.