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-rw-r--r--compiler/rustc_parse/src/lib.rs1
-rw-r--r--compiler/rustc_parse/src/parser/tokenstream/tests.rs2
2 files changed, 2 insertions, 1 deletions
diff --git a/compiler/rustc_parse/src/lib.rs b/compiler/rustc_parse/src/lib.rs
index 88b67d792de..c26c7b9122a 100644
--- a/compiler/rustc_parse/src/lib.rs
+++ b/compiler/rustc_parse/src/lib.rs
@@ -9,6 +9,7 @@
 #![feature(default_field_values)]
 #![feature(if_let_guard)]
 #![feature(iter_intersperse)]
+#![feature(iter_order_by)]
 #![recursion_limit = "256"]
 // tidy-alphabetical-end
 
diff --git a/compiler/rustc_parse/src/parser/tokenstream/tests.rs b/compiler/rustc_parse/src/parser/tokenstream/tests.rs
index 19b2c98f5af..63177a72744 100644
--- a/compiler/rustc_parse/src/parser/tokenstream/tests.rs
+++ b/compiler/rustc_parse/src/parser/tokenstream/tests.rs
@@ -15,7 +15,7 @@ fn sp(a: u32, b: u32) -> Span {
 }
 
 fn cmp_token_stream(a: &TokenStream, b: &TokenStream) -> bool {
-    a.len() == b.len() && a.iter().zip(b.iter()).all(|(x, y)| x.eq_unspanned(y))
+    a.iter().eq_by(b.iter(), |x, y| x.eq_unspanned(y))
 }
 
 #[test]