From 192acb4b98bb027cb09eaeb8906dbc94a76b9b66 Mon Sep 17 00:00:00 2001
From: Takayuki Maeda <takoyaki0316@gmail.com>
Date: Wed, 9 Mar 2022 16:04:14 +0900
Subject: [PATCH] take over unclosed_delims

---
 compiler/rustc_parse/src/parser/path.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/compiler/rustc_parse/src/parser/path.rs b/compiler/rustc_parse/src/parser/path.rs
index c8ebf707477ac..264174b0ac71d 100644
--- a/compiler/rustc_parse/src/parser/path.rs
+++ b/compiler/rustc_parse/src/parser/path.rs
@@ -631,6 +631,7 @@ impl<'a> Parser<'a> {
                 Err(err) => {
                     if is_const_fn {
                         if let Ok(expr) = snapshot.parse_expr_res(Restrictions::CONST_EXPR, None) {
+                            snapshot.unclosed_delims.extend(self.unclosed_delims.clone());
                             *self = snapshot;
                             return Ok(Some(self.dummy_const_arg_needs_braces(err, expr.span)));
                         }