Looks like something broke.
Code:
# mandb
mandb: warning: $MANPATH set, ignoring /etc/man_db.conf
Purging old database entries in /usr/man...
Processing manual pages under /usr/man...
Updating index cache for path `/usr/man/man3p'. Wait...mandb: warning: : ignoring bogus filename
mandb: warning: : ignoring bogus filename
mandb: warning: : ignoring bogus filename
mandb: warning: : ignoring bogus filename
mandb: warning: : ignoring bogus filename
mandb: warning: : ignoring bogus filename
mandb: warning: @
|: ignoring bogus filename
mandb: warning: �g: ignoring bogus filename
mandb: warning: : ignoring bogus filename
Segmentation fault
# mandb -c
mandb: warning: $MANPATH set, ignoring /etc/man_db.conf
Processing manual pages under /usr/man...
Updating index cache for path `/usr/man/man6'. Wait...free(): double free detected in tcache 2
Aborted
Reverting to the old mandb package while keeping the new man-pages package works ok.