creation of anyhow error with backtrace enabled causes unloading fail

[xxshady]

reproduction:

1. cargo add anyhow --features backtrace

#[relib_module::export]
pub fn main() {
  let err = anyhow::anyhow!("err");
  println!("[module] hello world\n{err:?}");
}

3. run host with RUST_BACKTRACE=1

UPD: turns out the reason of this is std backtrace, more short repro:

#[relib_module::export]
pub fn main() {
  let backtrace = std::backtrace::Backtrace::force_capture();
  let _ = dbg!(backtrace);
}

[xxshady]

doesn't happen on windows though

[xxshady]

nevermind, there is kinda similar issue on windows (it was hidden because currently there is no "final unloading check" on windows)