FlowVR daemon invalid behaviour

I don't know why, but sometimes (~1/400, ~1/950, ~1/1800, ~1/56 run) the abort signal in flowvr from one module doesn't go to the second module, but most of the time everything works.

I have written to @braffin about this problem and gave him a Docker image where it sometime happens.

I think we should disable flowvr tests until we figure out why this is happening.

Here is a part of the log from one of my test:

...
[PDI][/8ef555d808bd/7627/read:P/recv][07:35:33] *** warning: (FlowVR) Module (recv): Got `abort' abort event. Aborting...
[PDI][07:35:33] *** info: Finalization
[PDI][/8ef555d808bd/7627/read:P/recv][07:35:33] *** debug: (FlowVR) Module (recv): Close flowvr module 
[PDI][/8ef555d808bd/7627/read:P/recv][07:35:33] *** debug: (FlowVR) Module (recv): Clear traces
[PDI][/8ef555d808bd/7627/read:P/recv][07:35:33] *** debug: (FlowVR) Module (recv): Clear plugins intput ports
[PDI][/8ef555d808bd/7627/read:P/recv][07:35:33] *** debug: (FlowVR) Module (recv): Clear plugins output ports
[PDI][/8ef555d808bd/7627/read:P/recv][07:35:33] *** info: (FlowVR) Module (recv): Module finalized
[PDI][/8ef555d808bd/7627/read:P/send][07:35:33] *** debug: (FlowVR) Output Mouse Payload (mouseOut): Pressed key with descriptor `middle_button'
[PDI][/8ef555d808bd/7627/read:P/send][07:35:33] *** debug: (FlowVR) Output Mouse Payload (mouseOut): Mouse position [12.3, -23.4]
[PDI][/8ef555d808bd/7627/read:P/send][07:35:33] *** debug: (FlowVR) Module (send): Calling flowvr_module->wait()
[PDI][/8ef555d808bd/7627/read:P/send][07:35:33] *** debug: (FlowVR) Module (send): `wait' returned status: 3
[PDI][/8ef555d808bd/7627/read:P/send][07:35:33] *** debug: (FlowVR) Output Mouse Payload (mouseOut): Copy mouse button state to `right_button'
[PDI][/8ef555d808bd/7627/read:P/send][07:35:33] *** debug: (FlowVR) Output Mouse Payload (mouseOut): Copy mouse button state to `middle_button'
[PDI][/8ef555d808bd/7627/read:P/send][07:35:33] *** debug: (FlowVR) Output Mouse Payload (mouseOut): Copy mouse button state to `left_button'
[PDI][/8ef555d808bd/7627/read:P/send][07:35:33] *** debug: (FlowVR) Output Mouse Payload (mouseOut): Copy mouse position to `pos_xy'
[PDI][/8ef555d808bd/7627/read:P/send][07:35:34] *** debug: (FlowVR) Output Mouse Payload (mouseOut): Pressed key with descriptor `middle_button'
[PDI][/8ef555d808bd/7627/read:P/send][07:35:34] *** debug: (FlowVR) Output Mouse Payload (mouseOut): Pressed key with descriptor `left_button'
[PDI][/8ef555d808bd/7627/read:P/send][07:35:34] *** debug: (FlowVR) Output Mouse Payload (mouseOut): Mouse position [13.53, -25.74]
[PDI][/8ef555d808bd/7627/read:P/send][07:35:34] *** debug: (FlowVR) Module (send): Calling flowvr_module->wait()
[PDI][/8ef555d808bd/7627/read:P/send][07:35:34] *** debug: (FlowVR) Module (send): `wait' returned status: 3
...

Abort section in source code:

if (!m_flowvr_module) return;
context().logger()->warn("(FlowVR) Module ({}): Got `{}' abort event. Aborting...", m_module_name, abort_event);
m_flowvr_module->abort();

Wait section in source code:

context().logger()->debug("(FlowVR) Module ({}): Calling flowvr_module->wait()", m_module_name);
int wait_status = m_flowvr_module->wait();
if (!wait_status) {
    context().logger()->warn("(FlowVR) Module ({}): `wait' returned status: {}", m_module_name, wait_status);
} else {
    context().logger()->debug("(FlowVR) Module ({}): `wait' returned status: {}", m_module_name, wait_status);
}