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[Bug 1506358] Re: libmirclient gives up and terminates prematurely with "std::exception::what: disconnected: no new buffers" via ExchangeSemantics::submit()

To: desktop-packages@xxxxxxxxxxxxxxxxxxx
From: Pat McGowan <pat.mcgowan@xxxxxxxxxxxxx>
Date: Thu, 18 Feb 2016 15:51:46 -0000
Reply-to: Bug 1506358 <1506358@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

** Changed in: canonical-devices-system-image
    Milestone: ww04-2016 => ww08-2016

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https://bugs.launchpad.net/bugs/1506358

Title:
  libmirclient gives up and terminates prematurely with
  "std::exception::what: disconnected: no new buffers" via
  ExchangeSemantics::submit()

Status in Canonical System Image:
  Confirmed
Status in Mir:
  Confirmed
Status in mir package in Ubuntu:
  Confirmed
Status in xorg-server package in Ubuntu:
  Invalid

Bug description:
  Under heavy resizing (stress testing under Valgrind), my Mir client
  (Xmir) crashed with:

  [1444895332.392862] <ERROR> MirBufferStreamAPI: Caught exception at client library boundary (in mir_buffer_stream_swap_buffers): /build/mir-7io2Aj/mir-0.16.0+15.10.20150921.1/src/client/buffer_stream.cpp(169): Throw in function virtual MirWaitHandle* {anonymous}::ExchangeSemantics::submit(const std::function<void()>&, mir::geometry::Size, MirPixelFormat, int)
  Dynamic exception type: boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<std::runtime_error> >
  std::exception::what: disconnected: no new buffers

  The strange thing is it's only the client that died. The server
  survived and I can connect new clients to it.

  Duplicate bug reports now show Unity8 is another such client suffering
  from this crash. It's occurring on phones in the wild.

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