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[Bug 1829860] Re: APT unlocks in same order as it locks

To: group.of.nepali.translators@xxxxxxxxxxxxxxxxxxx
From: Julian Andres Klode <1829860@xxxxxxxxxxxxxxxxxx>
Date: Fri, 12 Mar 2021 12:51:25 -0000
Reply-to: Bug 1829860 <1829860@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

** Changed in: apt (Ubuntu Xenial)
       Status: New => Won't Fix

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https://bugs.launchpad.net/bugs/1829860

Title:
  APT unlocks in same order as it locks

Status in apt package in Ubuntu:
  Fix Released
Status in apt source package in Xenial:
  Won't Fix
Status in apt source package in Bionic:
  Fix Released
Status in apt source package in Disco:
  Fix Released

Bug description:
  [Impact]
  APT releases the locks in the same order it acquires them, rather than reverse order. Given that we have no waiting for locks, this is not _super_ problematic, but it might be wrong: You'd get a lock failure on dpkg's lock, rather than lock-frontend.

  [Test case]
  Watch lock release with strace and see that it unlocks the right way.

  [Regression potential]
  Some other locking races or something?

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