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[Launchpad Bug Tracker <1793298@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package snapd-glib - 1.47-0ubuntu0.16.04.0

---------------
snapd-glib (1.47-0ubuntu0.16.04.0) xenial; urgency=medium

  * New upstream release (LP: #1818766)
  * debian/rules:
    - Build with --enable-installed-tests
  * debian/tests/control:
  * debian/tests/unit:
  * debian/snapd-glib-tests.install:
    - Add autopkg tests
  * debian/libsnapd-glib1.symbols:
    - Updated

snapd-glib (1.45-0ubuntu0.16.04.1) xenial; urgency=medium

  * New upstream release (LP: #1793298):
    - Remove deprecated snapd-login-service
    - New API:
      - snapd_app_get_common_id
      - snapd_client_get_apps2_sync
      - snapd_client_get_apps2_async
      - snapd_client_get_apps2_finish
      - snapd_client_get_maintenance
      - snapd_client_get_snap_async
      - snapd_client_get_snap_finish
      - snapd_client_get_snap_sync
      - snapd_client_get_snaps_async
      - snapd_client_get_snaps_finish
      - snapd_client_get_snap_sync
      - snapd_maintenance_get_kind
      - snapd_maintenance_get_message
      - snapd_media_get_media_type
      - snapd_media_get_url
      - snapd_media_get_width
      - snapd_media_get_height
      - snapd_snap_get_base
      - snapd_snap_get_common_ids
      - snapd_snap_get_media
      - snapd_snap_get_mounted_from
      - snapd_snap_get_publisher_display_name
      - snapd_snap_get_publisher_id
      - snapd_snap_get_publisher_username
      - snapd_snap_get_publisher_validation
      - snapd_system_information_get_build_id
      - snapd_system_information_get_refresh_hold
      - snapd_system_information_get_refresh_last
      - snapd_system_information_get_refresh_next
      - snapd_system_information_get_refresh_schedule
      - snapd_system_information_get_refresh_timer
      - snapd_system_information_get_sandbox_features
      - SNAPD_ERROR_AUTH_CANCELLED
      - SNAPD_ERROR_NOT_FOUND
      - SNAPD_ERROR_NOT_IN_STORE
      - SNAPD_ERROR_NOT_CLASSIC
      - SNAPD_ERROR_REVISION_NOT_AVAILABLE
      - SNAPD_ERROR_CHANNEL_NOT_AVAILABLE
      - SNAPD_ERROR_NOT_A_SNAP
      - SNAPD_FIND_FLAGS_SCOPE_WIDE
    - Deprecated API:
      - snapd_client_get_apps_sync
      - snapd_client_get_apps_async
      - snapd_client_get_apps_finish
      - snapd_client_list_async
      - snapd_client_list_finish
      - snapd_client_list_sync
      - snapd_login_async
      - snapd_login_finish
      - snapd_login_sync
      - snapd_snap_get_screenshots
    - Fix buffer overflows reading HTTP chunked data
    - Reconnect to snapd if disconnected while trying to send the request
    - Handle short writes to snapd
    - Remove cancelled requests from the request queue.
    - Fix SnapdClient reference leak in each request
    - Fix snapd_snap_match_channel not matching risks correctly
    - Fix progress callback scope annotations
    - Fix double-unref on cancelled requests
    - Support new snap media and mounted-from fields
    - Support filtering when querying apps
    - Support snapd maintenance information
    - Support new error codes
    - GIR annotation fixes
  * debian/libsnapd-glib1.symbols:
    - Updated
  * debian/control:
  * debian/snapd-login-service.install
    - snapd-login-service removed

 -- Robert Ancell <robert.ancell@xxxxxxxxxxxxx>  Wed, 06 Mar 2019
15:54:33 +1300

** Changed in: snapd-glib (Ubuntu Xenial)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1793298

Title:
  snapd-glib changes needed for pulseaudio snap policy module xenial
  backport

Status in snapd-glib source package in Xenial:
  Fix Released

Bug description:
  [Impact]
  Older versions of Ubuntu are running older versions of snapd-glib. There have since been bug fixes and support for newer API that was added to snapd since release.

  [Test Case]
  1. Delete existing Snap credentials by deleting keys com.ubuntu.UbuntuOne.GnomeSoftware in Seahorse.
  2. Start GNOME Software
  3. Install a snap (e.g. moon-buggy)

  Expected result:
  User is prompted for Ubuntu credentials and is able to install snap.

  Observed result:
  Works as expected (i.e. only looking for regressions).

  [Regression Potential]
  There is a risk of breaking existing use cases. This is reduced by the regression tests in the package and the newer versions of snapd-glib working in newer releases.

  The xenial backport of the fix for 1781428 malfunctioned due to the
  use of snapd-glib behaviour introduced after the version included in
  xenial: namely auto-connection (and reconnection) to the snapd socket
  that was introduced in snapd-glib 1.24.

  With the policy module loaded, Pulse Audio will contact snapd to check
  the interfaces plugged by a client in order to decide whether to
  provide access to the microphone.  As the Pulse Audio daemon is long
  lived, it is not uncommon for the socket connection to be disconnected
  (either due to a timeout, or because snapd is upgraded while the user
  is logged in).  So simply adding a snapd_client_connect() call at
  module initialisation time is not sufficient.

  The specific snapd-glib calls that could be affected are:

   * snapd_client_list_one_async
   * snapd_client_get_interfaces_async

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