Close DB connection unproperty

Hello guys! Anybody can me explain that will happen with DB session in the next snip.

REPORT  ztest.

DATA ld_o_conn   TYPE REF TO cl_sql_connection.

ld_o_conn = cl_sql_connection=>get_connection( 'ISUGDP' ).

MESSAGE 'EMERGENCY EXIT' TYPE 'X'.

ld_o_conn->close( ).

After dump garbage collector will clean up connection object and simultaneously close db session or not.