I tried this code:

#![windows_subsystem = "windows"]

use std::process;

fn main() {
    process::Command::new("notepad.exe").spawn().unwrap();
}

I expected to see this happen:
Setting #![windows_subsystem = "windows"], processes will not be spawned under Windows server 2008 SYSTEM privileges.

Meta

rustc --version --verbose:

rustc 1.70.0 (90c541806 2023-05-31)
binary: rustc
commit-hash: 90c541806f23a127002de5b4038be731ba1458ca
commit-date: 2023-05-31
host: x86_64-pc-windows-msvc
release: 1.70.0
LLVM version: 16.0.2

Because of the specification of #![windows_subsystem = "windows"], so I can't see the backtrace