The SELECT statement at the end of the following block of SQL outputs no
rows, but it should output one row.

<blockquote><verbatim>
CREATE TABLE t1(a, b);
CREATE TABLE t2(c, d);
INSERT INTO t1 VALUES(1, 'xyz');
INSERT INTO t2 VALUES('abc', 'not xyz');
CREATE INDEX i2 ON t2(c) WHERE d='xyz';
SELECT * FROM (SELECT * FROM t1 WHERE a=1 AND b='xyz'), t2 WHERE c='abc';


A correct result is obtained if the index created on the penultimate line
is convert into a complete index or if the index is omitted entirely.

This bug appears to have been in the implementation of partial indexes
from their introduction in SQLite version 3.8.0, 2013-08-26.