};
use if_chain::if_chain;
use matches::matches;
+use rustc::declare_lint_pass;
use rustc::hir::*;
use rustc::lint::{LateContext, LateLintPass, LintArray, LintPass};
use rustc::ty;
-use rustc::{declare_lint_pass, declare_tool_lint};
use rustc_errors::Applicability;
+use rustc_session::declare_tool_lint;
use syntax_pos::Symbol;
declare_clippy_lint! {