[Aptitude-devel] Bug#602746: Exception : ../../src/ui.cc:1389: void auto_fix_broken(): Assertion "resman->resolver_exists()" failed.

[Manuel A. Fernandez Montecelo]

Control: tags -1 + moreinfo


Hi Ciril and Jan-Hendrik,

2010-11-07 18:50 Cyril Brulebois:
>Package: aptitude
>Version: 0.6.3-3.2
>Severity: important
>
>Hi,
>
>context: I've got the whole X Server 1.9 stack installed from experimental,
>except a few video drivers. After having uploaded -ati/-radeon to
>experimental, I tried to install them through the GUI, with '+' on them,
>but that doesn't work because the unstable version is preferred, so they
>appear as 'broken' (as expected). Then, in turn, I pick the experimental
>version, and everything goes green again.
>
>Unfortunately, hitting 'g' to perform the installation leads to this
>assertion:
>| Exception : ../../src/ui.cc:1389: void auto_fix_broken(): Assertion "resman->resolver_exists()" failed.
>
>That's reproducible.
>
>(Full package name: xserver-xorg-video-ati and xserver-xorg-video-radeon.)
>
>
>Trying the CLI, same kind of issues. Here's a transcript:
>[...]
>| The following actions will resolve these dependencies:
>|
>|      Install the following packages:
>| 1)     xserver-xorg-video-ati [1:6.13.2-1 (experimental)]
>| 2)     xserver-xorg-video-radeon [1:6.13.2-1 (experimental)]
>|
>|
>|
>| Accept this solution? [Y/n/q/?] y
>| The following packages have unmet dependencies:
>|   xserver-xorg-core: Breaks: xserver-xorg-video-6 which is a virtual package.
>| *** ERROR: search aborted by fatal exception.  You may continue
>|            searching, but some solutions will be unreachable.
>|
>| I want to resolve dependencies, but no dependency resolver was created.The following NEW packages will be installed:
>|   xserver-xorg-video-ati xserver-xorg-video-radeon
>| 0 packages upgraded, 2 newly installed, 0 to remove and 2 not upgraded.
>| Need to get 0 B/910 kB of archives. After unpacking 1847 kB will be used.
>| aptitude failed to find a solution to these dependencies.  You can solve them yourself by hand or type 'n' to quit.
>| The following packages have unmet dependencies:
>|   xserver-xorg-core: Breaks: xserver-xorg-video-6 which is a virtual package.
>| Resolve these dependencies by hand? [N/+/-/_/:/?] ^C
>
>That's reproducible as well.
>
>As you can see below, I have Debian's testing, unstable, and
>experimental repositories enabled, and only that.


2010-12-03 17:39 Jan-Hendrik (HennR) Peters:
>Same problem here.
>
>I'm trying to replace xserver-xorg-video-radeonhd with
>xserver-xorg-video-radeon:
>
># aptitude install xserver-xorg-video-radeon
>
>[...]
>
>Accept this solution? [Y/n/q/?] y
>The following packages have unmet dependencies:
>  xserver-xorg-core: Breaks: xserver-xorg-video-6 which is a virtual
>package.
>*** ERROR: search aborted by fatal exception.  You may continue
>           searching, but some solutions will be unreachable.
>
>I want to resolve dependencies, but no dependency resolver was
>created.The following NEW packages will be installed:
>  xserver-xorg-video-radeon
>0 packages upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
>Need to get 0 B/665 kB of archives. After unpacking 1,520 kB will be used.
>aptitude failed to find a solution to these dependencies.  You can solve
>them yourself by hand or type 'n' to quit.
>The following packages have unmet dependencies:
>  xserver-xorg-core: Breaks: xserver-xorg-video-6 which is a virtual
>package.
>Resolve these dependencies by hand? [N/+/-/_/:/?]
>Abort.
>
>
>So far so good.
>
>But if I start aptitude with ncurses and do the following:
>
>mark xserver-xorg-video-radeonhd to get removed
>mark xserver-xorg-video-radeon to get installed
>switch to dependency resolve mode (pressing e)
>choose alternative number 2 (install xserver-xorg-video-radeon)
>submitting my choice by pressing "!" aptitude crashes with this error:
>
>Uncaught exception: ../../src/ui.cc:1389: void auto_fix_broken():
>Assertion "resman->resolver_exists()" failed.
>
>sometimes I have to press "g" to make it crash tough.
>
>Well, I just figured out that this happens as well if I don't mark
>xserver-xorg-video-radeonhd to get removed before.


Have you both experienced this issue in that last few years, after this
report that you have sent?

I have not seen any other bug reports related with this problem in the
hundreds that I have triaged in the last few years, and the problems in
this report seem to have happened at a very specific point in time,
within one month, and never reported since.

This can have been caused by a bad compilation, or bad interaction/ABI
incompatibility of some of the libraries.

If it wasn't experienced after that point in time, I don't think that it
makes a lot of sense to chase it after 5 years.


Cheers.
-- 
Manuel A. Fernandez Montecelo <manuel.montezelo at gmail.com>