Spider: [ERROR] Got error 12701 when reading table './test/t' on SELECT

INSTALL PLUGIN spider SONAME 'ha_spider.so';

CREATE TABLE t (c INT KEY,c2 INT,KEY(c2)) ENGINE=SPIDER PARTITION BY LIST COLUMNS (c) (PARTITION p DEFAULT ENGINE=SPIDER);

ALTER TABLE t ADD c2 BINARY FIRST;

SELECT * FROM t WHERE c2='' AND c2='' AND c='' ORDER BY c2 DESC;

Leads to an ERROR visible in the error log only:

2021-09-06 11:19:39 4 [ERROR] Got error 12701 when reading table './test/t'

Furthermore, error 12701 is undefined:

$ ./bin/perror 12701

Illegal error code: 12701

Bug confirmed present in:
MariaDB: 10.4.22 (dbg), 10.4.22 (opt), 10.5.13 (dbg), 10.5.13 (opt), 10.6.5 (dbg), 10.6.5 (opt), 10.7.0 (dbg), 10.7.0 (opt)

Bug (or feature/syntax) confirmed not present in:
MariaDB: 10.2.41 (dbg), 10.2.41 (opt), 10.3.32 (dbg), 10.3.32 (opt)
MySQL: 5.5.62 (dbg), 5.5.62 (opt), 5.6.51 (dbg), 5.6.51 (opt), 5.7.35 (dbg), 5.7.35 (opt), 8.0.26 (dbg), 8.0.26 (opt)