On Thu, 15 Jun 2017 20:31:00 +0000, Niels Thykier wrote:
> Basically, jessie's verison of desktop-file-utils and shared-mime-info
> have "-await" triggers (implicit) which will push other packages into a
> "TRIGGER_PENDING" state.
> Once they are in that state, the "damage" is done and those other
> packages will no longer satisfy dependencies until the trigger has been
> processed. Notably, dpkg is unable to /undo/ this state even if the
> trigger changes from -await to -noawait during the upgrade.
>
> * If this holds, then changing the desktop-file-utils and
> shared-mime-info triggers *in stable* to -noawait should make the
> problem go away.
>
> * I realise it is unfeasible to implement in Debian by Saturday, but
> it would help us understand the root cause of the problem.
> - Tests to confirm/disprove this would be very welcome.
I think I can't confirm this theory. What I did:
A) Round 1: reproduce the problem:
1) enter a jessie cowbuilder chroot
2) rm /etc/apt/apt.conf.d/15pbuilder # which turns off installing recommends
3) apt-get install task-gnome-desktop
4) sed -i -e 's/jessie/stretch/g' /etc/apt/sources.list
5) apt-get update
6) apt-get upgrade
7) apt-get dist-upgrade
Result:
(Reading database ... 132342 files and directories currently installed.)
Removing openjdk-7-jre:amd64 (7u111-2.6.7-1~deb8u1) ...
Removing openjdk-7-jre-headless:amd64 (7u111-2.6.7-1~deb8u1) ...
Removing tzdata-java (2017b-0+deb8u1) ...
Processing triggers for hicolor-icon-theme (0.15-1) ...
dpkg: cycle found while processing triggers:
chain of packages whose triggers are or may be responsible:
gnome-menus -> desktop-file-utils
packages' pending triggers which are or may be unresolvable:
gnome-menus: /usr/share/applications
shared-mime-info: /usr/share/mime/packages
desktop-file-utils: /usr/share/applications
mime-support: /usr/share/applications
dpkg: error processing package gnome-menus (--remove):
triggers looping, abandoned
Processing triggers for desktop-file-utils (0.23-1) ...
Processing triggers for mime-support (3.60) ...
Errors were encountered while processing:
gnome-menus
E: Sub-process /usr/bin/dpkg returned an error code (1)
B) Round 2: play with triggers:
Same as above, except that after 3) I did
3a) sed -i -e 's/interest /interest-noawait /' /var/lib/dpkg/info/{desktop-file-utils,shared-mime-info}.triggers
and after 6) I again ran
6a) sed -i -e 's/interest /interest-noawait /' /var/lib/dpkg/info/{desktop-file-utils,shared-mime-info}.triggers
Result:
(Reading database ... 132342 files and directories currently installed.)
Removing openjdk-7-jre:amd64 (7u111-2.6.7-1~deb8u1) ...
Removing openjdk-7-jre-headless:amd64 (7u111-2.6.7-1~deb8u1) ...
Removing tzdata-java (2017b-0+deb8u1) ...
Processing triggers for hicolor-icon-theme (0.15-1) ...
dpkg: cycle found while processing triggers:
chain of packages whose triggers are or may be responsible:
gnome-menus -> desktop-file-utils
packages' pending triggers which are or may be unresolvable:
gnome-menus: /usr/share/applications
shared-mime-info: /usr/share/mime/packages
desktop-file-utils: /usr/share/applications
mime-support: /usr/share/applications
dpkg: error processing package gnome-menus (--remove):
triggers looping, abandoned
Processing triggers for desktop-file-utils (0.23-1) ...
Processing triggers for mime-support (3.60) ...
Errors were encountered while processing:
gnome-menus
E: Sub-process /usr/bin/dpkg returned an error code (1)
# for p in desktop-file-utils shared-mime-info gnome-menus mime-support ; do echo $p:; cat /var/lib/dpkg/info/$p.triggers; done
desktop-file-utils:
interest-noawait /usr/share/applications
shared-mime-info:
interest-noawait /usr/share/mime/packages
gnome-menus:
interest-noawait /usr/share/applications
interest-noawait gmenucache
mime-support:
interest-noawait /usr/lib/mime/packages
interest-noawait /usr/share/applications
Cheers,
gregor
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