//!
//! [rustc guide]: https://rust-lang.github.io/rustc-guide/mir/borrowck.html
-use rustc::hir::intravisit::{self, NestedVisitorMap, Visitor};
use rustc::hir::map::Map;
use rustc::middle::region::*;
use rustc::ty::query::Providers;
use rustc_data_structures::fx::FxHashSet;
use rustc_hir as hir;
use rustc_hir::def_id::DefId;
+use rustc_hir::intravisit::{self, NestedVisitorMap, Visitor};
use rustc_hir::{Arm, Block, Expr, Local, Node, Pat, PatKind, Stmt};
use rustc_index::vec::Idx;
use rustc_span::source_map;