From d496cca3b161d9f6a3f9202f97e45382281ba749 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tomasz=20Mi=C4=85sko?= <tomasz.miasko@gmail.com>
Date: Tue, 14 Dec 2021 00:00:00 +0000
Subject: [PATCH] Derive hash for BitSet and BitMatrix

---
 compiler/rustc_index/src/bit_set.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/compiler/rustc_index/src/bit_set.rs b/compiler/rustc_index/src/bit_set.rs
index 08f13d46ee1..241cbe23487 100644
--- a/compiler/rustc_index/src/bit_set.rs
+++ b/compiler/rustc_index/src/bit_set.rs
@@ -87,7 +87,7 @@ macro_rules! bit_relations_inherent_impls {
 /// to or greater than the domain size. All operations that involve two bitsets
 /// will panic if the bitsets have differing domain sizes.
 ///
-#[derive(Eq, PartialEq, Decodable, Encodable)]
+#[derive(Eq, PartialEq, Hash, Decodable, Encodable)]
 pub struct BitSet<T> {
     domain_size: usize,
     words: Vec<Word>,
@@ -987,7 +987,7 @@ impl<T: Idx> GrowableBitSet<T> {
 ///
 /// All operations that involve a row and/or column index will panic if the
 /// index exceeds the relevant bound.
-#[derive(Clone, Eq, PartialEq, Decodable, Encodable)]
+#[derive(Clone, Eq, PartialEq, Hash, Decodable, Encodable)]
 pub struct BitMatrix<R: Idx, C: Idx> {
     num_rows: usize,
     num_columns: usize,