error: unsupported operation: can't create threads on Windows
  --> RUSTLIB/std/src/sys/PLATFORM/thread.rs:LL:CC
   |
LL |           let ret = c::CreateThread(
   |  ___________________^
LL | |             ptr::null_mut(),
LL | |             stack,
LL | |             thread_start,
...  |
LL | |             ptr::null_mut(),
LL | |         );
   | |_________^ can't create threads on Windows
   |
   = help: this is likely not a bug in the program; it indicates that the program performed an operation that the interpreter does not support
   = note: backtrace:
   = note: inside `std::sys::PLATFORM::thread::Thread::new` at RUSTLIB/std/src/sys/PLATFORM/thread.rs:LL:CC
   = note: inside `std::thread::Builder::spawn_unchecked_::<[closure@$DIR/thread-spawn.rs:LL:CC], ()>` at RUSTLIB/std/src/thread/mod.rs:LL:CC
   = note: inside `std::thread::Builder::spawn_unchecked::<[closure@$DIR/thread-spawn.rs:LL:CC], ()>` at RUSTLIB/std/src/thread/mod.rs:LL:CC
   = note: inside `std::thread::Builder::spawn::<[closure@$DIR/thread-spawn.rs:LL:CC], ()>` at RUSTLIB/std/src/thread/mod.rs:LL:CC
   = note: inside `std::thread::spawn::<[closure@$DIR/thread-spawn.rs:LL:CC], ()>` at RUSTLIB/std/src/thread/mod.rs:LL:CC
note: inside `main` at $DIR/thread-spawn.rs:LL:CC
  --> $DIR/thread-spawn.rs:LL:CC
   |
LL |     thread::spawn(|| {});
   |     ^^^^^^^^^^^^^^^^^^^^

note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace

error: aborting due to previous error