span_lint_and_then,
};
use if_chain::if_chain;
+use rustc::declare_lint_pass;
use rustc::lint::{in_external_macro, EarlyContext, EarlyLintPass, LintArray, LintContext, LintPass};
-use rustc::{declare_lint_pass, declare_tool_lint};
use rustc_data_structures::fx::FxHashMap;
use rustc_errors::Applicability;
+use rustc_session::declare_tool_lint;
use syntax::ast::*;
use syntax::source_map::Span;
use syntax::visit::{walk_expr, FnKind, Visitor};