LP:848926 - GIS functions return "GEOMETRYCOLLECTION()" instead of "GEOMETRYCOLLECTION EMPTY"

MariaDB [test]> select astext(ST_INTERSECTION( MULTILINESTRINGFROMTEXT(' MULTILINESTRING( (3 5, 2 4, 2 5, 3 5) ) ') , LINESTRINGFROMTEXT(' LINESTRING( 5 5 , 9 3 , 5 5 , 6 1 ) ') ))\G

• • • • • • • • • • • • • • • • • • • • • • • • • • • 1. row ***************************
                                                      astext(ST_INTERSECTION( MULTILINESTRINGFROMTEXT(' MULTILINESTRING( (3 5, 2 4, 2 5, 3 5) ) ') , LINESTRINGFROMTEXT(' LINESTRING( 5 5 , 9 3 , 5 5 , 6 1 ) ') )): GEOMETRYCOLLECTION()
                                                      1 row in set (0.00 sec)

GEOMETRYCOLLECTION() is not recognized by PostGIS as a valid value. PostGIS returns "GEOMETRYCOLLECTION EMPTY".

Also, trying to use GEOMETRYCOLLECTION() in a calculation results in a totally bogus result:

MariaDB [test]> SELECT ASTEXT(ENVELOPE(GEOMETRYFROMTEXT('GEOMETRYCOLLECTION()')))\G

• • • • • • • • • • • • • • • • • • • • • • • • • • • 1. row ***************************
                                                      ASTEXT(ENVELOPE(GEOMETRYFROMTEXT('GEOMETRYCOLLECTION()'))): POLYGON((1.79769313486232e+308 1.79769313486232e+308,-1.79769313486232e+308 1.79769313486232e+308,-1.79769313486232e+308 -1.79769313486232e+308,1.79769313486232e+308 -1.79769313486232e+308,1.79769313486232e+308 1.79769313486232e+308))