The program exits unexpectedly

[unDEFER via Digitalmars-d-learn]

On Friday, 9 December 2016 at 09:29:36 UTC, rikki cattermole 
wrote:
> On 09/12/2016 10:26 PM, unDEFER wrote:
> An exception/error might be thrown, try catching Error's in the 
> threads function.
> Also try adding an infinite loop to it.

Exceptions works good, and prints debug message always. It is not 
exception..
I have tried to add try/catch around full loop of the program. It 
doesn't work. And program has infinite loop.
But maybe it is unhandled signal?