Auto merge of #43971 - alexcrichton:lint-statements, r=michaelwoerister

rustc: Add `Local` to the HIR map of parents

When walking parents for lints we want to be sure to hit `let` statements which
can have attributes, so hook up these statements in the HIR map.

Closes #43910

1 files changed, 16 insertions, 0 deletions

diff --git a/src/test/run-pass/issue-43910.rs b/src/test/run-pass/issue-43910.rs
new file mode 100644
index 00000000000..d61ce7f4689
--- /dev/null
+++ b/src/test/run-pass/issue-43910.rs
@@ -0,0 +1,16 @@
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![deny(unused_variables)]
+
+fn main() {
+    #[allow(unused_variables)]
+    let x = 12;
+}