delegates and threads

[Johan Granberg]

I have been writing a function that takes an array of delegates and 
executes them in parallel. (attached)

It works sort of but I ran into problems when I tried to use delegates 
that referenced the frame/this pointer. (gdc-0.18 osx based on dmd 0.157)

Object a=new Object();
void foo(){printf("p");}//OK
void foo(){printf("%*s",a.toString());}//segfault

Is their anything in the language that prevents a thread from reading 
the stack of another through a pointer? (or is this a language/compiler 
bug) I have written a reduced test case bellow.

Thanks in advance.

//begin testcase
import parallel;

class A
{
	void b(){printf("boo\n");}
}
void main()
{
	A a=new A();
	void delegate()[] o;
	o~=delegate void()
	{
		printf("minsk\n");
	};
	o~=delegate void()
	{
		a.b();
	};
	o~=delegate void()
	{
		printf("foo\n");
	};
	printf("before\n");
	parallelize(o);
	printf("after\n");
}
//prints
Starting program: /Users/johan/Desktop/test/test
Reading symbols for shared libraries . done
before
minsk
foo

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_PROTECTION_FAILURE at address: 0x00000000
[Switching to process 3902 thread 0xf03]
_Dmain12__dgliteral2FZv () at test.d:17
17                      a.b();
//end

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