Add ast::ExprKind::Dummy

src/expr.rs

@@ -404,7 +404,7 @@ fn needs_space_after_range(rhs: &ast::Expr) -> bool {
             // These do not occur in the AST because macros aren't expanded.
             unreachable!()
         }
-        ast::ExprKind::Err => None,
+        ast::ExprKind::Err | ast::ExprKind::Dummy => None,
     };
 
     expr_rw

src/utils.rs

@@ -497,6 +497,7 @@ pub(crate) fn is_block_expr(context: &RewriteContext<'_>, expr: &ast::Expr, repr
         | ast::ExprKind::Break(..)
         | ast::ExprKind::Cast(..)
         | ast::ExprKind::Continue(..)
+        | ast::ExprKind::Dummy
         | ast::ExprKind::Err
         | ast::ExprKind::Field(..)
         | ast::ExprKind::IncludedBytes(..)