The following bug has been logged on the website:
Bug reference: 14366
Logged by: peng sun
Email address: bluevaley(at)gmail(dot)com
PostgreSQL version: 9.6.0
Operating system: win8.1
Description:
select jsonb_set('[{"f1":1,"f2":null},2,null,3]', '{0}','[2,3,4]', false);
in 9.6, got:
[2, null, 3]
in 9.5.4, got:
[[2, 3, 4], 2, null, 3]