//! unsupported file system and emit a warning in that case. This is not yet
//! implemented.
-use rustc::session::{CrateDisambiguator, Session};
use rustc_data_structures::fx::{FxHashMap, FxHashSet};
use rustc_data_structures::svh::Svh;
use rustc_data_structures::{base_n, flock};
use rustc_fs_util::{link_or_copy, LinkOrCopy};
+use rustc_session::{CrateDisambiguator, Session};
use std::fs as std_fs;
use std::io;