Problems with Mutex

[Neven via Digitalmars-d-learn]

I'm trying to use Mutex from core.sync.mutex; but when I try to 
initialize it at compile time this error pops up:

Error: constructor core.sync.mutex.Mutex.this 
core.sync.mutex.Mutex cannot be constructed at compile time, 
because the constructor has no available source code

So I try to initialize it at run time but whenever I use that 
mutex in code (via synchronized blocks) I get segmetation faults 
(SIGSEGV).

Code here: http://pastebin.com/Z8Yj2kwY