Make == for associative arrays test for equality, not identity. _aaEq was added to runtime/internal/aaA.d which forwards to TypeInfo_AssociativeArray.equals in genobj.d. On the codegen side, DtoAAEquals was added to gen/aa.cpp and is called from EqualExp::toElem in gen/toir.cpp. I assume that the frontend will produce an error if == is used on associative arrays of different type. This fixes DMD bug 1429.

private import tango.core.Thread;

extern(C) void printf(char*, ...);

void foo()
{
		printf("-- I am here\n");
		Fiber.yield();
		printf("-- Now I am here\n");
}

void main()
{
	Fiber f = new Fiber(&foo);

	printf("Running f once\n");
	f.call();
	printf("Running f again\n");
	f.call();
}