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[Launchpad Bug Tracker <1815665@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package postgresql-10 - 10.7-0ubuntu0.18.10.1

---------------
postgresql-10 (10.7-0ubuntu0.18.10.1) cosmic; urgency=medium

  * New upstream release (LP: #1815665)
    - By default, panic instead of retrying after fsync() failure, to avoid
      possible data corruption. A new server parameter "guc-data-sync-retry"
      has been added to control this;
    - d/p/pg-10-Disallow-setting-client_min_messages-higher-than-ERR.patch:
      to retain SRU stability this patch reverts one of the changes which
      disabled the error suppression by setting client_min_messages to
      fatal or panic. Overall that means no change to the handling of
      client_min_messages due to this upload.
    - d/p/pg-10-Rename-rbtree.c-functions-to-use-rbt-prefix-not-rb-p.patch:
      this change of 10.7 would break an external ABI/API exposed to
      extensions. To avoid breaking those (especially those not in the Ubuntu
      Archive that we can't control) this change of upstreams stable release
      is reverted. Thereby the ABI/API is unchanged in regard to the rb_
      function prefix by this new package upload to Ubuntu.
    - Details about these and many further changes can be found at:
      https://www.postgresql.org/docs/10/static/release-10-7.html

 -- Christian Ehrhardt <christian.ehrhardt@xxxxxxxxxxxxx>  Tue, 12 Feb
2019 21:25:34 +0100

** Changed in: postgresql-10 (Ubuntu Cosmic)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1815665

Title:
  New upstream microreleases 9.5.16, 10.7 and 11.2

Status in pglogical-ticker package in Ubuntu:
  Fix Released
Status in postgresql-11 package in Ubuntu:
  Fix Released
Status in postgresql-rum package in Ubuntu:
  Fix Released
Status in postgresql-9.5 source package in Xenial:
  Fix Committed
Status in postgresql-10 source package in Bionic:
  Fix Committed
Status in postgresql-10 source package in Cosmic:
  Fix Released
Status in postgresql-11 source package in Disco:
  Fix Released

Bug description:
  Current versions in supported releases:
   postgresql-9.3 | 9.3.23-0ubuntu0.14.04 trusty <- no upstream updates anymore
   postgresql-9.5 | 9.5.14-0ubuntu0.16.04 xenial
   postgresql-10 | 10.6-0ubuntu0.18.04.1 bionic
   postgresql-10 | 10.6-0ubuntu0.18.10.1 cosmic

  Special cases:
  - Disco will be synced from Debian soon (we are on 11.1-2)
  - This is again a security update, so we prep and security will eval and publish through -security

  Last relevant related stable updates: 9.5.16, 10.7

  So the todo is to pick:
  MRE: Xenial 9.5.14 from https://ftp.postgresql.org/pub/source/v9.5.16/postgresql-9.5.16.tar.gz
  MRE: Bionic/Cosmic 10.7   from https://ftp.postgresql.org/pub/source/v10.7/postgresql-10.7.tar.gz

  Standing MRE - Consider last updates as template:
  - pad.lv/1637236
  - pad.lv/1664478
  - pad.lv/1690730
  - pad.lv/1713979
  - pad.lv/1730661
  - pad.lv/1747676
  - pad.lv/1752271
  - pad.lv/1786938
  New - this bug
  - pad.lv/1815665

  As usual we test and prep from the PPA and then push through
  SRU/Security as applicable.

  Regression potential:
  - usually this works smoothly except a few test hickups that need to be
    clarified to be sure. But this time there are changes worth to
    mention for the SRU team.
    - change [1] is in all branches Xenil/Bionic/Cosmic and after
      coordinating with Debian and Upstream and some members of the SRU Team
      (Malta) and Debian we decided to revert this change in all releases
      that get SRUs (So 11.x in Disco is the only who will get it).
      What makes this slightly more important is that: if 
      client_min_messages is misused, then not having that fix
      could cause bad data.
      But users of Ubuntu are either:
      a) not affected at all and therefore are fine as-is (majority)
      b) not affected by the problem but have tests/scripts/CI/... that
         rely on the behavior (we don't want to SRU break them)
      c) have a case that is affected, in that case the "code using
         client_min_messages" is the one to be considered broken (in favor
         of the majority of users) and that code should be changed instead
         of PostgreSQL.
      Furthermore with that decision we are also in sync with Debian
      handling the same
   - Change [2] renaming of symbols rb/rbt is fine doing forward (Disco),
     but not in Bionic/Cosmic as we'd break en external ABI of the past in
     an SRU. Please Note that the offending plruby this change was made for
     is not even in the Archive.
   => Especially in regard to "regression potential" that means that we will
      NOT apply the two changes that are somewhat discussion-worthy. We
      might in later updates reconsider them, but for now when applying the
      latest stable release we revert those two primarily for the reason to
      have the lowest possible regression potential for the SRU.

  Note: opening private as it is not yet announced
  Public announce will on thursday.

  [1]: https://git.postgresql.org/gitweb/?p=postgresql.git;a=commit;h=c09daa910
  [2]: https://git.postgresql.org/gitweb/?p=postgresql.git;a=commit;h=b2e754c14

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