Using thread::sleep inside panic hook aborts panic hook

I tried this code:

    panic::set_hook(Box::new(|panic_info| {
      log::debug!("step 1");
      thread::sleep(time::Duration::from_secs(3));
      log::debug!("step 2");
      if let Err(e) = Command::new("...").spawn() {
        log::error!(e);
      }
      log::debug!("step 3");
      process::exit(0);
    }));

I expected to see this happen: all the code in the panic handler is executed.

Instead, this happened: with the thread::sleep, the execution of the panic handler is silently stopped at this step (the following code is simply ignored!). When removing the thread::sleep, the panic handler gets executed as expected.

Meta

cargo 1.77.2 (e52e36006 2024-03-26)
release: 1.77.2
commit-hash: e52e360061cacbbeac79f7f1215a7a90b6f08442
commit-date: 2024-03-26
host: x86_64-unknown-linux-gnu
libgit2: 1.7.2 (sys:0.18.2 vendored)
libcurl: 8.5.0-DEV (sys:0.4.70+curl-8.5.0 vendored ssl:OpenSSL/1.1.1w)
ssl: OpenSSL 1.1.1w 11 Sep 2023
os: Debian 12.0.0 [64-bit]

cargo build --target x86_64-pc-windows-gnu

Start by reproducing the provided panic hook on the stated Debian and x86_64-pc-windows-gnu environments, comparing execution with and without thread::sleep. Trace the panic-hook and process-exit behavior to determine whether the interruption is expected; done means the behavior is explained and, if it is a bug, covered by an appropriate regression test.