std.concurrency and module constructors

[japplegame]

OS: Windows 7 64bit
Compiler: DMD32 D Compiler v2.059

Using spawn in module constructor causes very strange behavior.

import std.concurrency;
import std.stdio;
void main() {
}
void worker() {
  receiveOnly!OwnerTerminated;
}
static this() {
  writeln("module constructor");
  spawn(&worker);
}
static ~this() {
  writeln("module destructor");
}

prints in console:

module constructor
module destructor
module constructor
module destructor
module constructor
module constructor
module constructor
module constructor
module constructor
...