[Bug 262488] SIGSEGV in strlen() caused by "pkg upgrade -Ffy"

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=262488

--- Comment #1 from Dennis Clarke <dclarke@blastwave.org> ---

This may be related to a "bad" package. Not sure yet and I am looking
into it. However a package cooked up from ports with a newer version
of "pkg" may result in queries that return a null string and then strlen
dumps core later. As I say, this is something I am looking into. 

Running pkg upgrade -Ffy with DEBUG_LEVEL 4 revels the final queries:

.
.
.
DBG(3)[54023]> added shlib deps for nvidia-driver-304 on libX11.so.6
DBG(4)[54023]> Pkgdb: running 'SELECT name  FROM pkg_shlibs_provided, shlibs AS
s  WHERE package_id = 5522    AND shlib_id = s.id  ORDER by name DESC'
DBG(3)[54023]> added shlib provide libvdpau_nvidia.so.1 for nvidia-driver-304
DBG(3)[54023]> added shlib provide libnvidia-tls.so.1 for nvidia-driver-304
DBG(3)[54023]> added shlib provide libnvidia-glcore.so.1 for nvidia-driver-304
DBG(3)[54023]> added shlib provide libnvidia-cfg.so.1 for nvidia-driver-304
DBG(3)[54023]> added shlib provide libXvMCNVIDIA_dynamic.so.1 for
nvidia-driver-304
DBG(3)[54023]> added shlib provide libGL.so.1 for nvidia-driver-304
DBG(4)[54023]> Pkgdb: running 'SELECT k.annotation AS tag, v.annotation AS
value  FROM pkg_annotation p    JOIN annotation k ON (p.tag_id =
k.annotation_id)    JOIN annotation v ON (p.value_id = v.annotation_id)  WHERE
p.package_id = 5522  ORDER BY tag, value'
DBG(4)[54023]> Pkgdb: running 'SELECT packages.name  FROM pkg_conflicts    LEFT
JOIN packages ON    (packages.id = pkg_conflicts.conflict_id)  WHERE package_id
= 5522'
DBG(4)[54023]> Pkgdb: running 'SELECT provide  FROM pkg_provides, provides AS s
 WHERE package_id = 5522    AND provide_id = s.id  ORDER by provide DESC'
DBG(4)[54023]> Pkgdb: running 'SELECT require  FROM pkg_requires, requires AS s
 WHERE package_id = 5522    AND require_id = s.id  ORDER by require DESC'
Child process pid=54023 terminated abnormally: Segmentation fault
europa# 
europa# 

I did try to look at the schema of tables in the pkg sqlite database to
find some information about whatever package_id 5522 is but I can not
find anything at all.

I don't know if I can proceed much further and may do a total reinstall
with CURRENT and then see what happens.

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