In Win9x , GC can't allocate large buffers like this.

byte [] v = new byte[4096*256];

GC can't allocate this. Somebody said something is wrong with GC, but I don't think so.

When allocPage is failed , fullcollect would be called.
GetThreadContext in fullcollect returns FALSE.
and make an assert failure.

: Thread t = threads[n] ;
: if( !GetThreadContext( t.hdl, &context ) ){
:@@assert(0) ;  // here
: }

Obviously t.hdl is the duplicated handle made by calling
getCurrentThreadHandle() from Thread.this() in std.thread.

But getCurrentThreadHandle can't duplicate this.
After DuplicateHandle is called, GetLastError says 'invalid handle' in Win9x.
(Now I can't guess why it is..)

That's all why GC can't allocate and GC looks to have a failure. It is a very serious problem , I think. Fix required.

yaneurao.