As far as I can see, when checksumming is turned off or there's a collision, it is possible that lzjb_uncompress is fed with corrupted data. Source length is entirely ignored and since source has to be shorter than dest, it is broken.
For bugs matching the following criteria: Status: In Progress Changed: (is less than) 2014-06-01 Reset to default assignee and clear in-progress tags. Mail being skipped