FK to inherited table, referential integrity violation

Is it bug?

CREATE TABLE base ( base INT PRIMARY KEY );
CREATE TABLE child ( val INT ) INHERITS ( base );
CREATE TABLE ref (
atr INT
, base INT REFERENCES base ON UPDATE cascade ON DELETE cascade );

INSERT INTO child VALUES ( 1, 2 );

SELECT * FROM base;
base
------
1

SELECT * FROM child;
base | val
------+-----
1 | 2

INSERT INTO ref VALUES ( 3, 1 );

ERROR: $1 referential integrity violation - key referenced from ref not
found in base

--
oo don't worry
\__/ be happy