not_to(contain) fails while not_to_contain passes #1245

create or replace package example as
    --%suite(example)

    --%test
    procedure not_to_contain_passes;

    --%test
    procedure not_to_bracket_contain_bracket_fails;
end;
/

create or replace package body example as
    procedure not_to_contain_passes
        is
        c1 sys_refcursor;
        c2 sys_refcursor;
    begin
        open c1 for select 'a' as letter from dual union all select 'b' from dual;
        open c2 for select 'c' as letter from dual;
        ut.expect(c1).not_to_contain(c2); -- !!!
    end not_to_contain_passes;

    procedure not_to_bracket_contain_bracket_fails
        is
        c1 sys_refcursor;
        c2 sys_refcursor;
    begin
        open c1 for select 'a' as letter from dual union all select 'b' from dual;
        open c2 for select 'c' as letter from dual;
        ut.expect(c1).not_to(contain(c2)); -- !!!!
    end not_to_bracket_contain_bracket_fails;
end;
/

set serveroutput on;
execute ut.run(a_path => 'example');