BUG #17394: pg_dump: query returned 0 rows instead of one:

The following bug has been logged on the website:

Bug reference:      17394
Logged by:          Surya Prakash
Email address:      suryasp1010@gmail.com
PostgreSQL version: 11.13
Operating system:   Windows server 2019
Description:

pg_dump: saving database definition
pg_dump: query returned 0 rows instead of one: 
SELECT proretset, prosrc, probin, pg_catalog.pg_get_function_arguments(oid)
AS funcargs,pg_catalog.pg_get_function_identity_arguments(oid) AS funciargs,
pg_catalog.pg_get_function_result(oid) AS funcresult,
array_to_string(protrftypes, ' ') AS protrftypes, prokind, provolatile,
proisstrict, prosecdef, proleakproof, proconfig, procost, prorows,
proparallel, (SELECT lanname FROM pg_catalog.pg_language WHERE oid =
prolang) AS lanname FROM pg_catalog.pg_proc WHERE oid =
'1046460'::pg_catalog.oid


I am getting this above error while taking backup of a database.