[Bug 1815187] Re: Fix crash when opening DepCache before Cache

[Julian Andres Klode]

** Description changed:

  [Impact]
  apt search and probably other code crashes some time, as GetDepCache() in trusty does not call BuildCaches() first.
  
  [Test case]
- TODO, some apt search -o RootDir=<something> foobar
+ Run apt search -o RootDir=/dev/null foobar, make sure it does not crash.
  
  [Regression potential]
  There may be some locking implications, as we build caches when opening depcache first, without locks. That said, the same code is in use in all post-trusty releases, and they work fine.

** Also affects: apt (Ubuntu Trusty)
   Importance: Undecided
       Status: New

** Changed in: apt (Ubuntu Trusty)
       Status: New => In Progress

** Changed in: apt (Ubuntu)
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/1815187

Title:
  Fix crash when opening DepCache before Cache

Status in apt package in Ubuntu:
  Fix Released
Status in apt source package in Trusty:
  In Progress

Bug description:
  [Impact]
  apt search and probably other code crashes some time, as GetDepCache() in trusty does not call BuildCaches() first.

  [Test case]
  Run apt search -o RootDir=/dev/null foobar, make sure it does not crash.

  [Regression potential]
  There may be some locking implications, as we build caches when opening depcache first, without locks. That said, the same code is in use in all post-trusty releases, and they work fine.

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