From ff00ef4d6656af5708958dee3ca9ed1918648b6d Mon Sep 17 00:00:00 2001
From: Thomas Eizinger <thomas@eizinger.io>
Date: Fri, 29 Jan 2021 14:49:23 +1100
Subject: [PATCH] Apply workaround from #72003 for #56935

Related: #72017.
---
 compiler/rustc_index/src/lib.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/compiler/rustc_index/src/lib.rs b/compiler/rustc_index/src/lib.rs
index eaef4c7b54a62..995034e81da28 100644
--- a/compiler/rustc_index/src/lib.rs
+++ b/compiler/rustc_index/src/lib.rs
@@ -8,3 +8,7 @@
 
 pub mod bit_set;
 pub mod vec;
+
+// FIXME(#56935): Work around ICEs during cross-compilation.
+#[allow(unused)]
+extern crate rustc_macros;