valgrind acceptance-tests: [ FAILED ] TestClientInput.hidden_clients_do_not_receive_pointer_events

valgrind acceptance-tests:
[ FAILED ] TestClientInput.hidden_clients_do_not_receive_pointer_events

[ RUN ] TestClientInput.hidden_clients_do_not_receive_pointer_events
unknown file: Failure
C++ exception with description "Poll on readfd for pipe timed out" thrown in the test body.
==4491==
==4491== HEAP SUMMARY:
==4491== in use at exit: 396 bytes in 8 blocks
==4491== total heap usage: 7,379 allocs, 7,371 frees, 452,861 bytes allocated
==4491==
==4491== LEAK SUMMARY:
==4491== definitely lost: 0 bytes in 0 blocks
==4491== indirectly lost: 0 bytes in 0 blocks
==4491== possibly lost: 118 bytes in 4 blocks
==4491== still reachable: 278 bytes in 4 blocks
==4491== suppressed: 0 bytes in 0 blocks
==4491== Rerun with --leak-check=full to see details of leaked memory
==4491==
==4491== For counts of detected and suppressed errors, rerun with: -v
==4491== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 2 from 2)
/home/dan/bzr/mir/trunk/tests/acceptance-tests/test_client_input.cpp:906: Failure
Actual function call count doesn't match EXPECT_CALL(*handler, handle_input(MotionEventWithPosition(2, 2)))...
         Expected: to be called once
           Actual: never called - unsatisfied and active
Google Test trace:
/home/dan/bzr/mir/trunk/tests/mir_test_framework/testing_process_manager.cpp:110: Client
==4490==
==4490== HEAP SUMMARY:
==4490== in use at exit: 6,739 bytes in 119 blocks
==4490== total heap usage: 20,221 allocs, 20,102 frees, 1,921,076 bytes allocated
==4490==
==4490== LEAK SUMMARY:
==4490== definitely lost: 0 bytes in 0 blocks
==4490== indirectly lost: 0 bytes in 0 blocks
==4490== possibly lost: 2,621 bytes in 43 blocks
==4490== still reachable: 4,118 bytes in 76 blocks
==4490== suppressed: 0 bytes in 0 blocks
==4490== Rerun with --leak-check=full to see details of leaked memory
==4490==
==4490== For counts of detected and suppressed errors, rerun with: -v
==4490== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 2 from 2)
/home/dan/bzr/mir/trunk/tests/mir_test_framework/testing_process_manager.cpp:127: Failure
Value of: result.succeeded()
  Actual: false
Expected: true
client terminate error=process::Result(child_terminated_normally, failure(1))
/home/dan/bzr/mir/trunk/tests/mir_test_framework/testing_process_manager.cpp:127: Failure
Value of: result.succeeded()
  Actual: false
Expected: true
client terminate error=process::Result(child_terminated_normally, failure(1))
terminate called after throwing an instance of 'boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<std::runtime_error> >'
  what(): Timed out waiting for client (2) to appear
==4455==
==4455== HEAP SUMMARY:
==4455== in use at exit: 63,229 bytes in 1,078 blocks
==4455== total heap usage: 10,191 allocs, 9,113 frees, 604,973 bytes allocated
==4455==
==4455== LEAK SUMMARY:
==4455== definitely lost: 0 bytes in 0 blocks
==4455== indirectly lost: 0 bytes in 0 blocks
==4455== possibly lost: 12,059 bytes in 215 blocks
==4455== still reachable: 51,170 bytes in 863 blocks
==4455== suppressed: 0 bytes in 0 blocks
==4455== Rerun with --leak-check=full to see details of leaked memory
==4455==
==4455== For counts of detected and suppressed errors, rerun with: -v
==4455== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 2 from 2)
/home/dan/bzr/mir/trunk/tests/mir_test_framework/testing_process_manager.cpp:191: Failure
Value of: result.succeeded()
  Actual: false
Expected: true
process::Result(child_terminated_by_signal, signal(9), )
[ FAILED ] TestClientInput.hidden_clients_do_not_receive_pointer_events (62289 ms)