Actually, i still have a problem, the leading single quote trick did not work for ICalConverter::importEventDateEnd

(gdb) b ICalConverter::importEventDateEnd
Can't find member of namespace, class, struct, or union named "ICalConverter::importEventDateEnd"
Hint: try 'ICalConverter::importEventDateEnd<TAB> or 'ICalConverter::importEventDateEnd<ESC-?>
(Note leading single quote.)
(gdb) b 'ICalConverter::importEventDateEnd

here, tabs show nothing.

any help is appreciated.