xlibgl1's self referential dependency - issue?

[u8wgve4z@umail.furryterror.org (Amy Fong)]

xlibgl1's depending on a package that it provides seems to have made
dpkg rather unhappy.

root@ashura:~/phase1-v12# dpkg -i xlibgl1_4.0.1-0phase1v12_i386.deb 
(Reading database ... 50139 files and directories currently installed.)
Preparing to replace xlibgl1 4.0.1-0phase1v12 (using xlibgl1_4.0.1-0phase1v12_i386.deb) ...
Unpacking replacement xlibgl1 ...
dpkg: /home/wichert/sources/dpkg-1.6.14/main/packages.c:191: process_queue: Assertion `dependtry <= 4' failed.
Aborted
root@ashura:~/phase1-v12# dpkg --force-depends -i xlibgl1_4.0.1-0phase1v12_i386.ddeb 
(Reading database ... 50139 files and directories currently installed.)
Preparing to replace xlibgl1 4.0.1-0phase1v12 (using xlibgl1_4.0.1-0phase1v12_i386.deb) ...
Unpacking replacement xlibgl1 ...
dpkg: xlibgl1: dependency problems, but configuring anyway as you request:
 xlibgl1 depends on libgl1; however:
  Package libgl1 is not installed.
Setting up xlibgl1 (4.0.1-0phase1v12) ...

root@ashura:~/phase1-v12# dpkg -s xlibgl1
Package: xlibgl1
Status: install ok installed
Priority: optional
Section: x11
Installed-Size: 3860
Maintainer: Branden Robinson <branden@debian.org>
Source: xfree86
Version: 4.0.1-0phase1v12
Replaces: mesag3
Provides: libgl1
Depends: libc6 (>= 2.1.2), libgl1, xlib6g (>= 4.0.1-0)
Conflicts: libgl1, mesag3
Description: XFree86 version of Mesa 3D graphics library
 Sorry, no extended desription yet.
 Does not contain libGLU.

-- 
Wordprocessors are for the lame... use TeX

              Amy Fong (afong@furryterror.org)