Crash when setting QSurfaceFormat samples count when threading rendering

[Zouch]

Hi all !
Take the "threadedopengldemo" example, and just add a format.setSamples(1); in the main function.
The program should crash (at least for me) with a Cannot make QOpenGLContext current in a different thread error.

Is this behaviour intended or is this a bug ? If it is intended, is there any way to work around this ?

Thanks in advance,
Zouch