PROger4ever

Can be caused by #3941 ?

> More likely there is an issue with your drivers or iGPU or similar. It's not likely. As I described above, this bug issued on different hardwares. > Why are...

> This is a bit strange, perhaps a race condition or other contention on accessing the file? Yeah, seems to be. Furthermore, 6.2.6 and Windows only (not sure)

Also, a job can be a _*struct* with method `Go()`_ instead of `func()` (or even an interface with default struct-implementation). It makes us able to send any data to a...