use crate::utils::{is_entrypoint_fn, match_def_path, paths, qpath_res, span_lint};
use if_chain::if_chain;
+use rustc::declare_lint_pass;
use rustc::hir::{Expr, ExprKind, Item, ItemKind, Node};
use rustc::lint::{LateContext, LateLintPass, LintArray, LintPass};
-use rustc::{declare_lint_pass, declare_tool_lint};
+use rustc_session::declare_tool_lint;
declare_clippy_lint! {
/// **What it does:** `exit()` terminates the program and doesn't provide a