Errors were encountered while processing: elementary-os-beta-transition

[Coiby Xu]

I try to install elementary OS on Ubuntu 12.04(64bit):
1. sudo add-apt-repository ppa:elementary-os/stable
2. sudo apt-get install elementary-desktop

But there's an error when processing package elementary-os-beta-transition :
"
/var/lib/dpkg/info/elementary-os-beta-transition.postinst: 45: .: Can't open /etc/upstream-release/lsb-release
"dpkg: error processing elementary-os-beta-transition (--configure):
 subprocess installed post-installation script returned error exit status 2
...
Errors were encountered while processing:
 elementary-os-beta-transition
E: Sub-process /usr/bin/dpkg returned an error code (1)

[Simon Baguley (simon-baguley)]

after any install (in this case chromium, as chrome has stopped working on elementary os for me) ...

In a Package operation failed window:

Errors were encountered while processing:
 elementary-os-beta-transition
Error in function:
Setting up elementary-os-beta-transition (0.1-0~8~precise1) ...
/var/lib/dpkg/info/elementary-os-beta-transition.postinst: 45: .: Can't open /etc/upstream-release/lsb-release
dpkg: error processing elementary-os-beta-transition (--configure):
 subprocess installed post-installation script returned error exit status 2

[Coiby Xu (coiby)]

A temporary solution is to create file /etc/upstream-release/lsb-release manually. So the installation process will continue.

[Antonio Chay Hidalgo (antonio-chay)]

The problem is with this script:
elementary-os-beta-transition.postinst

In line 6:
set -e

But then, later at line 45 has:
. /etc/upstream-release/lsb-release || true

So, looks like the error can be (or should be) safely ignored (you can "sudo touch /etc/upstream-release/lsb-release").
But! I don't know the intentions "set -e", and then "|| true" ?? that's inconsistent at best, I would say it is a bug ;-)

Regards!