When I run dpkg - i see:
> admin:/var/cache/apt/archives# dpkg -i libggi2_990212-1.deb
> (Reading database ... 84722 files and directories currently installed.)
> Preparing to replace libggi2 990212-1 (using libggi2_990212-1.deb) ...
> Unpacking replacement libggi2 ...
> Selecting previously deselected package libggi-target-x.
> Unpacking libggi-target-x (from libggi-target-x_990212-1.deb) ...
> dpkg: ../../../main/packages.c:191: process_queue: Assertion `dependtry > <= 4'
looks like dpkg bug
With best wishes