BUG #13937: 'src' -> jsonb_each() -> jsonb_object() -> 'dst' does not recreate 'src' as valid jsonb

The following bug has been logged on the website:

Bug reference:      13937
Logged by:          Xtra Coder
Email address:      xtracoder@gmail.com
PostgreSQL version: 9.5.0
Operating system:   Windows7
Description:

Steps to reproduce:
-------------------

DO LANGUAGE plpgsql $$
DECLARE
  jsonb_src jsonb;
  jsonb_dst jsonb;
BEGIN
  jsonb_src = '{
    "key1": {"data1": [1, 2, 3]},
    "key2": {"data2": [3, 4, 5]}
  }';
  raise notice 'jsonb_src = %', jsonb_src;

  with t_data as (select * from jsonb_each(jsonb_src))
  select jsonb_object(
    array(select key from t_data),
    array(select value::text from t_data) )
  into jsonb_dst;
  raise notice 'jsonb_dst = %', jsonb_dst;
END $$;


Actual result:
--------------

NOTICE:  jsonb_src = {"key1": {"data1": [1, 2, 3]}, "key2": {"data2": [3, 4,
5]}}
NOTICE:  jsonb_dst = {"key1": "{\"data1\": [1, 2, 3]}", "key2": "{\"data2\":
[3, 4, 5]}"}

What's wrong? - values in 'dst' are represented as text. Reason -
jsonb_object() has arguments as jsonb_object(keys text[], values text[]) and
there is no way to pass values as 'jsonb'. Conversion to 'text' looses JSON
structure.


Expected result:
----------------

NOTICE:  jsonb_src = {"key1": {"data1": [1, 2, 3]}, "key2": {"data2": [3, 4,
5]}}
NOTICE:  jsonb_dst = {"key1": {"data1": [1, 2, 3]}, "key2": {"data2": [3, 4,
5]}}

'src' and 'dst' JSON objects should be identical/equal.