From e6b1bdfc2925e0c90e44bfe9f50c9edd24916490 Mon Sep 17 00:00:00 2001
From: David Tolnay <dtolnay@gmail.com>
Date: Wed, 22 Mar 2023 16:46:18 -0700
Subject: [PATCH] Disallow consecutive path separator in use paths

For example: `use ::{::krate};`
---
 src/item.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/item.rs b/src/item.rs
index cc11bc2c60..0fce87ac6f 100644
--- a/src/item.rs
+++ b/src/item.rs
@@ -1252,7 +1252,7 @@ pub(crate) mod parsing {
         let vis: Visibility = input.parse()?;
         let use_token: Token![use] = input.parse()?;
         let leading_colon: Option<Token![::]> = input.parse()?;
-        let tree = parse_use_tree(input, allow_crate_root_in_path)?;
+        let tree = parse_use_tree(input, allow_crate_root_in_path && leading_colon.is_none())?;
         let semi_token: Token![;] = input.parse()?;
 
         let tree = match tree {