1 files changed, 5 insertions, 1 deletions
diff --git a/compiler/rustc_middle/src/ich/impls_syntax.rs b/compiler/rustc_middle/src/ich/impls_syntax.rs
index bfbe15749ee..31374429940 100644
--- a/compiler/rustc_middle/src/ich/impls_syntax.rs
+++ b/compiler/rustc_middle/src/ich/impls_syntax.rs
@@ -45,7 +45,11 @@ impl<'ctx> rustc_ast::HashStableContext for StableHashingContext<'ctx> {
             item.hash_stable(self, hasher);
             style.hash_stable(self, hasher);
             span.hash_stable(self, hasher);
-            tokens.as_ref().expect_none("Tokens should have been removed during lowering!");
+            assert_matches!(
+                tokens.as_ref(),
+                None,
+                "Tokens should have been removed during lowering!"
+            );
         } else {
             unreachable!();
         }