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-rw-r--r--src/tools/rustfmt/src/expr.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/tools/rustfmt/src/expr.rs b/src/tools/rustfmt/src/expr.rs
index 7808f891336..8dead8f078d 100644
--- a/src/tools/rustfmt/src/expr.rs
+++ b/src/tools/rustfmt/src/expr.rs
@@ -1947,7 +1947,7 @@ fn rewrite_unary_op(
 }
 
 pub(crate) enum RhsAssignKind<'ast> {
-    Expr(&'ast ast::ExprKind, Span),
+    Expr(&'ast ast::ExprKind, #[allow(unused_tuple_struct_fields)] Span),
     Bounds,
     Ty,
 }