From e08df2dd6b7c0470796ef8801635e60b8a21d34e Mon Sep 17 00:00:00 2001
From: Nicholas Nethercote <n.nethercote@gmail.com>
Date: Tue, 26 Apr 2022 15:21:15 +1000
Subject: [PATCH] Avoid producing `NoDelim` values in `MacArgs::delim()`.

---
 src/expr.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/expr.rs b/src/expr.rs
index 4f333cd27cef..cd724373f4d1 100644
--- a/src/expr.rs
+++ b/src/expr.rs
@@ -1325,7 +1325,7 @@ pub(crate) fn can_be_overflowed_expr(
         }
         ast::ExprKind::MacCall(ref mac) => {
             match (
-                rustc_ast::ast::MacDelimiter::from_token(mac.args.delim()),
+                rustc_ast::ast::MacDelimiter::from_token(mac.args.delim().unwrap()),
                 context.config.overflow_delimited_expr(),
             ) {
                 (Some(ast::MacDelimiter::Bracket), true)