BUG #17529: SQL Error [57P01]: FATAL: terminating connection due to administrator command

The following bug has been logged on the website:

Bug reference:      17529
Logged by:          Kevin Wolf
Email address:      kwolf@veritone.com
PostgreSQL version: 11.8
Operating system:   macbook
Description:

When running the following command, it returns the terminating connection
error message due to administrator command

SELECT  i.indexrelid::regclass,
       s.leaf_fragmentation
FROM pg_index AS i
   JOIN pg_class AS t ON i.indexrelid = t.oid
   JOIN pg_opclass AS opc ON i.indclass[0] = opc.oid
   JOIN pg_am ON opc.opcmethod = pg_am.oid
   CROSS JOIN LATERAL pgstatindex(i.indexrelid) AS s
   where s.leaf_fragmentation > 80
   and s.leaf_fragmentation != 'NaN'::NUMERIC
   --order by 2 desc
   limit 10

Additional error info: data source was invalidated