What happened to 'make missing'?

[Warren Block]

The missing target used to be very useful to see what impact installing 
a new port would have.

It seems to be increasingly broken.  On my desktop, any random port 
claims that misc/dejagnu and lang/expect are missing.  Neither are 
installed, neither is installed as a dependency for any port where
'make missing' claims they are needed.

While trying to figure out which part of the recent clamav update wanted 
to pull in sphinx-doc for python, it seems even worse.

Clamav is installed, and did not install any additional ports before 
installing.  Yet 'make missing' shows this:

textproc/py-sphinx
devel/py-Jinja2
misc/dejagnu
lang/expect
lang/tcl86
textproc/py-MarkupSafe
devel/py-babel
devel/py-pytz
textproc/py-docutils
devel/py-six
devel/py-pytest
devel/py-py
devel/py-mock
devel/py-pbr
devel/py-pip
devel/py-pytest-capturelog
devel/py-pytest-timeout
devel/py-pytest-xdist
devel/py-setuptools_scm
sysutils/py-execnet
misc/py-pexpect
devel/py-virtualenv
devel/py-scripttest
devel/py-pretend
devel/py-freezegun
devel/py-dateutil
devel/py-nose
databases/py-sqlite3
devel/git
textproc/xmlto
shells/bash
misc/getopt
textproc/libxslt
textproc/docbook-xsl
textproc/xmlcatmgr
textproc/docbook
textproc/docbook-sgml
textproc/iso8879
textproc/docbook-xml
textproc/xmlcharent
textproc/sdocbook-xml
print/libpaper
www/w3m
devel/boehm-gc
devel/libatomic_ops
textproc/asciidoc
devel/cvsps
devel/p5-Test-Exception
devel/p5-Sub-Uplevel
devel/p5-Test-NoWarnings
devel/p5-Test-Simple
devel/p5-Test-Warn
devel/p5-Test-Pod
security/p5-Authen-SASL
security/p5-GSSAPI
devel/bzr
lang/cython
security/py-paramiko
security/py-cryptography
devel/py-cffi
devel/py-pycparser
devel/py-pyasn1
dns/py-idna
net/py-ipaddress
devel/py-enum34
devel/py-iso8601
security/py-ecdsa
devel/py-funcsigs
textproc/py-pygments
textproc/py-sphinx_rtd_theme
textproc/py-alabaster
textproc/py-snowballstemmer
textproc/py-pystemmer
graphics/py-imagesize