[Bug 717397] Re: package squid 2.7.STABLE7-1ubuntu12.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Clint Byrum]

As I finish the SRU report, I realize that we actually need to address
this in natty too, and may need to drop the version comparison to make
it less complex and more likely to fix the problem given scenarios I
haven't thought of.

** Description changed:

  Binary package hint: squid
  
  Did a normal package update and got this error.  Sorry I don't have more
  details
  
  ProblemType: Package
  DistroRelease: Ubuntu 10.04
  Package: squid 2.7.STABLE7-1ubuntu12.1
  ProcVersionSignature: Ubuntu 2.6.32-28.55-generic 2.6.32.27+drm33.12
  Uname: Linux 2.6.32-28-generic i686
  NonfreeKernelModules: nvidia
  Architecture: i386
  Date: Fri Feb 11 08:43:15 2011
  ErrorMessage: subprocess installed post-installation script returned error exit status 1
  SourcePackage: squid
  Title: package squid 2.7.STABLE7-1ubuntu12.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
+ 
+ == SRU Report ==
+ 
+ === Impact ===
+ 
+ The bug will cause errors for anyone who has experienced bug #573853
+ while they try to upgrade to fix that very bug, which can be very
+ frustrating and confusing. It will also generate a lot of apport bug
+ reports like the ones that led to this report.
+ 
+ === Dev fix ===
+ 
+ This should be fixed in the natty packages in the same way, though the
+ version numbers may need to be adjusted.
+ 
+ === Patch ===
+ 
+ See merge proposal for lucid package. Similar fix can be done for natty
+ and maverick too. The maverick fix should accompany the fix for bug
+ #573853
+ 
+ === TEST CASE: ===
+ 
+ 1. install squid from lucid (not lucid-updates)
+ 2. sudo reload squid
+ 3. upgrade to the squid in lucid-updates
+ 4. the postinst will fail to restart squid
+ 5. repeat steps 2 - 4, but upgrade to the fixed package instead, the postinst should succeed.
+ 
+ === Regression Potential ===
+ 
+ Its possible that this code may introduce a new bug in the preinst that
+ will cause some trouble, though a healthy dose of testing has been taken
+ to try and prevent that.

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https://bugs.launchpad.net/bugs/717397

Title:
  package squid 2.7.STABLE7-1ubuntu12.1 failed to install/upgrade:
  subprocess installed post-installation script returned error exit
  status 1