48ad98e6a8
there's a bug elsewhere (autovivification of $w->{info}{BUILD_PACKAGES})
that I need to track down that results in $w->{info} being defined but
NOT a proper object.
dpb errors out at end-of-LISTING in case of a parse error in any Makefile.
solene@ ran into this a few days ago, probably some other people, and
finally I met the bug today. Ouchie. sorry about that.