[bug report] A sql statements make query hang

Hi,

When we run follow statements make query hang and never return in
PostgreSQL 13devel, we consider it might be a bug of PostgreSQL and report
it.

-------

CREATE TEMPORARY TABLE v0 ( v1 INT UNIQUE ) ;

WITH RECURSIVE v0 ( v1 ) AS ( SELECT -128 UNION SELECT v1 + 33 FROM v0 )
SELECT 'x' from v0;

-------

When we run in mysql, it suddenly return an empty set.

Best,

Yongheng & Rui