Uninterruptable regexp_replace in 9.3.1 ?

The following snippet reveals that 9.3.1 has a bug
in regexp_matches, which uninterruptably keeps CPU
spinning for minutes:

-----8<---------------------------------------------------

\timing
SET statement_timeout = 2;
-- this is only to show statement_timeout is effective here
SELECT count(*) from generate_series(1, 100000);
-- this one is uninterruptable!
SELECT regexp_matches($INPUT$

/a
$b$
$c$d
;
$INPUT$,
$REG$((?:[^'"$;]+|"[^"]*"|'(?:[^']*|'')*'|(\$[^$]*\$).*?\2)+)$REG$, 'g' );

-----8<---------------------------------------------------

The above has been tested to be harmless with PostgreSQL 9.1.11
in that the regexp_matches call is interrupted, but it is NOT
with PostgreSQL 9.3.1.

Is it a known bug ?

Please include my address in replies as I don't get notified
of list activity. Thanks.

--strk;

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