I just tested sendmail a bit under Gentoo 1.2 (gcc 2.95), and found that newaliases would segfault if built with -O3. with -O2 it works. my USE flags are: almach root # grep ^USE /etc/make.conf USE="imap tcpd mozilla gnome kde tk X pda lm-sensors arts esd" but I don't really think that would make much of a difference. I haven't tested this on 1.3 (gcc3*).
Seems to work with the new version of sendmail.
*** Bug 3763 has been marked as a duplicate of this bug. ***