Re: PANIC in GIN code

Now kill -9 postmaster, and restart. Voila, the page headers are all zeros:

postgres=# select * from page_header(get_raw_page('i_foo', 0));
    lsn    | checksum | flags | lower | upper | special | pagesize | version |
prune_xid
-----------+----------+-------+-------+-------+---------+----------+---------+-
----------
 0/1891270 |        0 |     0 |     0 |     0 |       0 |        0 |     0 |
        0
(1 row)

postgres=# select * from gin_metapage_info(get_raw_page('i_foo', 0));ERROR:  input page is not a GIN metapage
DETAIL:  Flags 0189, expected 0008

I just pushed a fix for this, but unfortunately it didn't make it 9.5alpha1.