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-rw-r--r--compiler/rustc_middle/src/ich/impls_syntax.rs6
-rw-r--r--compiler/rustc_middle/src/lib.rs1
-rw-r--r--compiler/rustc_middle/src/mir/interpret/allocation.rs2
3 files changed, 2 insertions, 7 deletions
diff --git a/compiler/rustc_middle/src/ich/impls_syntax.rs b/compiler/rustc_middle/src/ich/impls_syntax.rs
index 31374429940..aacec860711 100644
--- a/compiler/rustc_middle/src/ich/impls_syntax.rs
+++ b/compiler/rustc_middle/src/ich/impls_syntax.rs
@@ -45,11 +45,7 @@ impl<'ctx> rustc_ast::HashStableContext for StableHashingContext<'ctx> {
             item.hash_stable(self, hasher);
             style.hash_stable(self, hasher);
             span.hash_stable(self, hasher);
-            assert_matches!(
-                tokens.as_ref(),
-                None,
-                "Tokens should have been removed during lowering!"
-            );
+            assert!(tokens.as_ref().is_none(), "Tokens should have been removed during lowering!");
         } else {
             unreachable!();
         }
diff --git a/compiler/rustc_middle/src/lib.rs b/compiler/rustc_middle/src/lib.rs
index 6ddc38b0066..49765166c87 100644
--- a/compiler/rustc_middle/src/lib.rs
+++ b/compiler/rustc_middle/src/lib.rs
@@ -24,7 +24,6 @@
 
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
 #![feature(array_windows)]
-#![feature(assert_matches)]
 #![feature(backtrace)]
 #![feature(bool_to_option)]
 #![feature(box_patterns)]
diff --git a/compiler/rustc_middle/src/mir/interpret/allocation.rs b/compiler/rustc_middle/src/mir/interpret/allocation.rs
index 766d6a06f7e..898c375e9ae 100644
--- a/compiler/rustc_middle/src/mir/interpret/allocation.rs
+++ b/compiler/rustc_middle/src/mir/interpret/allocation.rs
@@ -339,7 +339,7 @@ impl<'tcx, Tag: Copy, Extra: AllocationExtra<Tag>> Allocation<Tag, Extra> {
         for dest in bytes {
             *dest = src.next().expect("iterator was shorter than it said it would be");
         }
-        assert_matches!(src.next(), None, "iterator was longer than it said it would be");
+        assert!(src.next().is_none(), "iterator was longer than it said it would be");
         Ok(())
     }