[sqlsmith] Planner error on lateral joins

Hi,

testing with sqlsmith on master at 3df51ca8b3 produced one instance of
the following error:

ERROR: failed to build any 6-way joins

I can reproduce it on a fresh regression database with the query below.
These were last logged in 2015. Back then, it resulted in this commit:

http://git.postgresql.org/pg/commitdiff/cfe30a72fa80528997357cb0780412736767e8c4

regards,
Andreas

select * from
(select sample_1.a as c0
from fkpart5.fk2 as sample_1) as subq_0,
lateral (select 1
from
(select
subq_0.c0 as c3,
subq_5.c0 as c7,
sample_2.b as c9
from
public.brin_test as sample_2,
lateral (select
subq_3.c1 as c0
from
fkpart5.pk3 as sample_3,
lateral (select
sample_2.a as c0,
sample_3.a as c1
from
public.rtest_interface as ref_0
) as subq_1,
lateral (select
subq_1.c1 as c1
from
public.alter_table_under_transition_tables as ref_1
) as subq_3
) as subq_5) as subq_6
right join public.gtest30_1 as sample_6
on (true)
where subq_6.c7 = subq_6.c3) as subq_7;