File descriptor leak in frontend - PromptSessionClientAPI acceptance test hang consistently after 67 iterations

Changed to critical since with this bug prompt sessions connections will eventually cause the server to run out of file descriptors.

To be more exact requests for fds for prompt providers will eventually cause the server to run out of file descriptors.

Fix committed into lp:mir/devel at revision None, scheduled for release in mir, milestone Unknown

Fix committed to lp:mir/0.6 at revision 1852.

Fix reverted. Turns out it not only didn't build but possibly isn't required on 0.6 at all... ?

I thought we had agreed to generate MPs against a release branch _after_ a release.

You're right; I forgot. It's reverted now anyway. Nothing has landed for 0.6.2 yet.

Fix committed to lp:mir/0.7 r1855

Fix committed to:
  0.8 (development-branch) at revision 1843, scheduled for release in Mir 0.8.0
  0.7 at revision 1855, scheduled for release in Mir 0.7.0

This bug was fixed in the package mir - 0.7.0+14.10.20140829-0ubuntu1

---------------
mir (0.7.0+14.10.20140829-0ubuntu1) utopic; urgency=medium

  [ Daniel van Vugt ]
  * New upstream release 0.7.0 (https://launchpad.net/mir/+milestone/0.7.0)
    - Enhancements:
      . Test suite: Reworked mechanism to override Mir client functions
      . Demo shell: Detect custom rendering (decorations) to make it
        compatible with overlay optimizations
      . Make sure to preserve fd resources until the end of the sending
        of the message
      . Add test cases and script for tracking changes to the new ABIs:
        libmircommon, libmirplatform
      . Symbols file for libmirplatform
      . Symbols file for libmircommon
      . Symbols file for libmirserver
      . Various improvements to the SessionMediator test
      . Various build related improvements
      . Print testcase output during package build
      . Abort test when InProcessServer startup fails
      . Link the integration and unit tests against the server objects
      . Add a document detailing the useful tests to run and the useful
        logs to collect when troubleshooting a new android chipset
      . Enable motion event resampling and prediction for a more responsive
        touch experience.
    - ABI summary: Servers need rebuilding, but clients do not
      . Mirclient ABI unchanged at 8
      . Mircommon ABI bumped to 1
      . Mirplatform ABI bumped to 2
      . Mirserver ABI bumped to 25
    - API changes
      . Deleted function - frontend::Shell::create_surface_for(). If you have
        the std::shared_ptr<frontend::Session> session, you can just do
        session->create_surface(params) instead to get a SurfaceId
    - Bug fixes:
      . Ensure we process lifecycle events before the nested server is torn
        down (LP: #1353465)
      . Fix race in InputTestingServerConfiguration (LP: #1354446)
      . Fix fd leaks in prompt session frontend code and tests (LP: #1353461)
      . Detect the additional things the demo shell draws on the renderable
        list and avoid calling the optimized post function if they are being
        drawn (LP: #1348330)
      . Client: Fix SIGTERM dispatch in our default lifecycle event handler
        (LP: #1353867)
      . DemoRenderer: Don't try to create a texture of width zero.
        (LP: #1358210)
      . Fix CI failures (LP: #1358698)
      . Fix build failure: "variable ‘rc’ set but not used" which happens in
        release mode when NDEBUG is set (LP: #1358625)
      . Only enumerate exposed input surfaces to avoid delivering events to
        occluded surfaces (LP: #1359264)
      . Android: do not post driver cancelled buffers (LP: #1359406)
      . Client: Ensure our platform library stays loaded for as long as it is
        needed by other objects (LP: #1358191)
      . Examples: Register the DemoCompositor with the Scene to properly
        process visibility events (LP: #1359487)
      . Mir_demo_client_basic: Don't assert on user errors like failing to
        connect to a Mir server (LP: #1331958)
      . Tests: Explicitly depend on GMock target to avoid build races
        (LP: #1362646)

  [ Ubuntu dai...