When writing an incorrect rule such as /foo pnugo instead of /foo
p+n+u+g+o aide exits with a segfault when parsing that rule.
Also, altering one of the default rules, such as trying to change the
R rule to R: p+i+n+u+g+s+m+c+sha1 instead of
p+i+n+u+g+s+m+c+md5 causes a segfault. (Changing it with an
equal sign is ok though).