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-rw-r--r--src/librustdoc/clean/types.rs2
-rw-r--r--src/librustdoc/lib.rs1
2 files changed, 2 insertions, 1 deletions
diff --git a/src/librustdoc/clean/types.rs b/src/librustdoc/clean/types.rs
index c2cf39c4be0..4eb32585ffb 100644
--- a/src/librustdoc/clean/types.rs
+++ b/src/librustdoc/clean/types.rs
@@ -1685,7 +1685,7 @@ impl Type {
         match (self_cleared, other_cleared) {
             // Recursive cases.
             (Type::Tuple(a), Type::Tuple(b)) => {
-                a.len() == b.len() && a.iter().zip(b).all(|(a, b)| a.is_doc_subtype_of(b, cache))
+                a.iter().eq_by(b, |a, b| a.is_doc_subtype_of(b, cache))
             }
             (Type::Slice(a), Type::Slice(b)) => a.is_doc_subtype_of(b, cache),
             (Type::Array(a, al), Type::Array(b, bl)) => al == bl && a.is_doc_subtype_of(b, cache),
diff --git a/src/librustdoc/lib.rs b/src/librustdoc/lib.rs
index c4f24e09ddb..d7ffb25f8bd 100644
--- a/src/librustdoc/lib.rs
+++ b/src/librustdoc/lib.rs
@@ -13,6 +13,7 @@
 #![feature(if_let_guard)]
 #![feature(iter_advance_by)]
 #![feature(iter_intersperse)]
+#![feature(iter_order_by)]
 #![feature(rustc_private)]
 #![feature(test)]
 #![warn(rustc::internal)]