Function capture_stack

tests/all/async_functions.rs:871–874

(stacks: &Arc<Mutex<Vec<WasmBacktrace>>>, store: impl AsContext)

    let stacks = Arc::new(Mutex::new(vec![]));
    fn capture_stack(stacks: &Arc<Mutex<Vec<WasmBacktrace>>>, store: impl AsContext) {
        let mut stacks = stacks.lock().unwrap();
        stacks.push(wasmtime::WasmBacktrace::force_capture(store));
    }

    linker1.func_wrap_async("", "host_capture_stack", {
        let stacks = stacks.clone();