Intermittent test failure: DragAndDrop.after_drag_finishes_pointer_events_no_longer_contain_handle

[Alan Griffiths]

Seems to be racy, but not (yet) been able to reproduce:

https://launchpadlibrarian.net/324221139/buildlog_ubuntu-zesty-ppc64el.miral_1.4.0+17.04.20170616.1-0ubuntu1_BUILDING.txt.gz

[ RUN ] DragAndDrop.after_drag_finishes_pointer_events_no_longer_contain_handle
[2017-06-16 08:42:53.734177] mirserver: Starting
[2017-06-16 08:42:53.734224] mirserver: Selected driver: mir:stub-graphics (version 0.27.0)
[2017-06-16 08:42:53.734351] mirserver: Using software cursor
[2017-06-16 08:42:53.741690] mirserver: Selected input driver: mir:stub-input (version: 0.27.0)
[2017-06-16 08:42:53.741772] mirserver: Mir version 0.27.0
[2017-06-16 08:42:53.742022] mirserver: Initial display configuration:
[2017-06-16 08:42:53.742040] mirserver: * Output 1: VGA connected, used
[2017-06-16 08:42:53.742048] mirserver: . |_ Physical size 0.0" 0x0mm
[2017-06-16 08:42:53.742055] mirserver: . |_ Power is on
[2017-06-16 08:42:53.742062] mirserver: . |_ Current mode 800x600 60.00Hz
[2017-06-16 08:42:53.742078] mirserver: . |_ Preferred mode 800x600 60.00Hz
[2017-06-16 08:42:53.742084] mirserver: . |_ Orientation normal
[2017-06-16 08:42:53.742090] mirserver: . |_ Logical size 800x600
[2017-06-16 08:42:53.742096] mirserver: . |_ Logical position +0+0
[2017-06-16 08:42:53.742110] mirserver: . |_ Scaling factor: 1.00
/<<BUILDDIR>>/miral-1.4.0+17.04.20170616.1/test/drag_and_drop.cpp:652: Failure
Value of: count_of_handles_when_moving_mouse()
Expected: is equal to 0
  Actual: 2 (of type int)
[2017-06-16 08:42:53.760806] mirserver: Stopping
[ FAILED ] DragAndDrop.after_drag_finishes_pointer_events_no_longer_contain_handle (28 ms)