Bypassing std.concurrency.exec()

[Johannes Blume via Digitalmars-d]

Another thing you should keep in mind is that thread_attachThis() 
does not invoke any module TLS constructors, so you should also 
call rt_moduleTlsCtor() unless you are absolutely sure none of 
the modules you use have one. Call rt_moduleTlsCtor() before you 
detach the thread. Those functions are not part of the official 
API, so you might have to declare them with

extern(C)
{
     void rt_moduleTlsCtor();
     void rt_moduleTlsDtor();
}