[Bug 1780099] Re: Cache remapping breaks hashing of Package objects

[Launchpad Bug Tracker]

This bug was fixed in the package python-apt - 1.6.2

---------------
python-apt (1.6.2) unstable; urgency=medium

  * Introduce gitlab ci
  * Document whatsnew in 1.6.y
  * Add more extensive test cases for cache remapping
  * Do not override __hash__ in apt.package.Package (LP: #1780099)
  * debian/python-apt.docs: README is README.md since some time
  * debian/control: Point to salsa instead of anonscm

 -- Julian Andres Klode <juliank at ubuntu.com>  Mon, 09 Jul 2018 15:37:51
+0200

** Changed in: python-apt (Ubuntu Bionic)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1780099

Title:
  Cache remapping breaks hashing of Package objects

Status in python-apt package in Ubuntu:
  Fix Committed
Status in python-apt source package in Bionic:
  Fix Released

Bug description:
  [Impact]
  The apt.Package objects use the id as the hash, but the hash can change after reopening, meaning that code will fail to work, for example:

  c=apt.Cache()
  p=c["a"]
  set_of_p={p}
  c.open()
  assert p in set_of_p

  will fail.

  [Test case]
  The above test case is run as part of autopkgtest (syntax is slightly different), so passing autopkgtests means verification is done.

  [Regression potential]
  Hashing packages objects will be slower as it hashes the name and architecture now.

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