[Bug 156070] [NEW] "Failed Upgrade tool signature" when using do-release-upgrade

[Launchpad Bug Tracker]

You have been subscribed to a public bug by James Westby (james-w):

Running up to date feisty on a server w/o X, trying to update to gutsy
via the do-release-upgrade command.  Seems like this command never works
right..........

root at Bunter:/# do-release-upgrade 
Checking for a new ubuntu release
Failed Upgrade tool signature
Done Upgrade tool
Done downloading            
extracting '/tmp/tmpA-amtI/gutsy.tar.gz'
authenticate '/tmp/tmpA-amtI/gutsy.tar.gz' against '/tmp/tmpA-amtI/' 
exception from gpg: GnuPG exited non-zero, with code 131072
Debug information: 

gpg: WARNING: unsafe permissions on homedir `/tmp/tmpA-amtI'

gpg: /tmp/tmpA-amtI/: read error: Is a directory
gpg: verify signatures failed: eof

Authentication failed
Authenticating the upgrade failed. There may be a problem with the network or with the server. 
root at Bunter:/#

Anybody have any ideas?

** Affects: apt-cacher (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: update-manager-core (Ubuntu)
     Importance: Undecided
         Status: Invalid

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"Failed Upgrade tool signature" when using do-release-upgrade
https://bugs.edge.launchpad.net/bugs/156070
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