Just click on this link:
https://sourceforge.net/p/codeblocks/tickets/ (https://sourceforge.net/p/codeblocks/tickets/)
and search if your bug isn't already present in the list. Make sure you search for ALL bugs and not just open bugs (we may have closed it already).
There's a "Create Ticket" button there, in case you didn't find the bug (you have to be logged in at sourceforge to see it! ).
Thanks.