BUG #18232: Function pushJsonbValueScalar has not Assert(scalarVal) on WJB_KEY, WJB_VALUE and WJB_ELEM

The following bug has been logged on the website:

Bug reference:      18232
Logged by:          RekGRpth
Email address:      rekgrpth@gmail.com
PostgreSQL version: 16.1
Operating system:   all
Description:

Function pushJsonbValueScalar has not Assert(scalarVal) on WJB_KEY,
WJB_VALUE and WJB_ELEM
So I can call pushJsonbValue(NULL, WJB_VALUE, NULL) and get Segmentation
fault