thread 'win32_file_io' panicked at tests\windows_overlapped.rs:75:17:
WriteFile failed: The handle is invalid. (os error 6)

#[repr(C)]
struct Packet {
   overlapped: OVERLAPPED
   ...
}

#[repr(C)]
struct Overlapped {
   overlapped: OVERLAPPED,
   packet: CompletionPacket
}
let packet = Overlapped {overlapped: unsafe{ std::mem::zeroed() }, ... }

* thread #5, name = 'win32_file_io', stop reason = Exception 0xc0000005 encountered at address 0x7ff7b1c2ddc7: Access violation reading location 0x00000010
    frame #0: 0x00007ff7b1c2ddc7 windows_overlapped-11aba7b23d31a0bc.exe`union enum2$<core::result::Result<tuple$<>,std::io::error::Error> > polling::iocp::afd::Afd<core::pin::Pin<alloc::sync::Arc<polling::iocp::afd::IoStatusBlock<enum2$<polling::iocp::PacketInner> >,alloc::alloc::Global> > >::poll<core::pin::Pin<alloc::sync::Arc<polling::iocp::afd::IoStatusBlock<enum2$<polling::iocp::PacketInner> >,alloc::alloc::Global> > >(self=0x0000000000000010, packet=Pin<alloc::sync::Arc<polling::iocp::afd::IoStatusBlock<enum2$<polling::iocp::PacketInner> >,alloc::alloc::Global> > @ 0x00000056d3bfcb50, base_socket=140701816385568, afd_events=(__0 = 1096427487)) at afd.rs:479
   476          let ntdll = NtdllImports::get()?;
   477          let result = unsafe {
   478              ntdll.NtDeviceIoControlFile(
-> 479                  self.handle,
   480                  ptr::null_mut(),
   481                  ptr::null_mut(),
   482                  iosb.cast(),

    #[repr(C)]
    pub(crate) struct IoStatusBlock<T> {
        -> overlapped: OVERLAPPED,