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(at)gmail(dot)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.