use crate::fmt;
use crate::sync::atomic::{AtomicUsize, Ordering::SeqCst};
use crate::sync::Mutex;
-use crate::sys_common::backtrace::{output_filename, lock};
+use crate::sys_common::backtrace::{lock, output_filename};
use crate::vec::Vec;
-use backtrace_rs as backtrace;
use backtrace::BytesOrWideString;
+use backtrace_rs as backtrace;
/// A captured OS thread stack backtrace.
///