Exiting Mantid before it has fully loaded on Linux does not exit

[DanNixon]

This issue was originally TRAC 10780

If I start Mantid from the terminal and exit before the splash screen has closed I get the following output on the terminal and Mantid never exits (at least as long as I have ever left it without issuing as SIGINT).

dan@dannixon-ubuntu ~/r/master-build> ./bin/MantidPlot 
FrameworkManager-[Notice] Welcome to Mantid 3.2.20141212.952
FrameworkManager-[Notice] Please cite: http://dx.doi.org/10.1016/j.nima.2014.07.029 and this release: http://dx.doi.org/10.5286/Software/Mantid
MantidUI-[Notice] MantidPlot is shutting down...

ps aux | grep MantidPlot shows the process is still hanging around there not doing much.

Giving a SIGINT exits instantly:

^Cfish: Job 1, “./bin/MantidPlot ” terminated by signal SIGINT (Quit request from job control (^C))
dan@dannixon-ubuntu ~/r/master-build>

Tested on Ubuntu 14.04, haven't haven't tried on Windows or other flavors of Linux.

[NickDraper]

wontfix