emulators/virtualbox-ose core dumps on builds

[Keith Hellman]

Hello all:

I'm running 
  FreeBSD 12.0-CURRENT #0 r320599: Mon Jul  3 15:34:15 UTC 2017     
  root at releng3.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC 
with /usr/ports at svn r450591.  I *just* pulled a brand new ports
tree, so I'm reasonably confident it is in good shape.

I've been having problems (for the past month, over several revs)
building emulators/virtualbox-ose, sadly it looks like
toolchain components are dumping core (see attached log, with an ar.core
that probably shouldn't be there.

I've noticed that kmk_redirect -rti (the failing command) means to
accept input from stdin, but then a filename is provided next.  It
doesn't seem the command make is running pipes data into the process.

I've dug around a bit the vb-ose src tree but I cannot for the life of
me find the offending kmk_redirect -rti command or how it is generated
--- I was hoping to at least confirm that the command line provided
RuntimeR3.a.ar-script is being generated and to remove the -i spec.

I suspect someone at vbox at freebsd.org would be faster at this than I.
Of course you could also tell me if I'm burrowing down a rabbit-hole
with a red-herring at the end :/

TiA for any help you can provide,
-- 
Keith Hellman                             #include <disclaimer.h>
khellman at mcprogramming.com                from disclaimer import standard
khellman at mines.edu                        gpg key 9FCF40FD
                                          freenode.net as mrtuple

"But VCs are mistaken to look for the next Microsoft, because no startup
can be the next Microsoft unless some other company is prepared to bend
over at just the right moment and be the next IBM."

-- http://www.paulgraham.com/gh.html
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