From b1d6aea3946ae9f52c6ecd0124ab31f6f74f7e2f Mon Sep 17 00:00:00 2001
From: Jonas Schievink <jonas.schievink@ferrous-systems.com>
Date: Thu, 6 Jan 2022 13:39:20 +0100
Subject: [PATCH] Fix parsing of `#[derive]` paths

---
 crates/hir_def/src/attr.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/crates/hir_def/src/attr.rs b/crates/hir_def/src/attr.rs
index ca87b501aa8..b0be892c7d3 100644
--- a/crates/hir_def/src/attr.rs
+++ b/crates/hir_def/src/attr.rs
@@ -737,6 +737,7 @@ pub fn parse_path_comma_token_tree(&self) -> Option<impl Iterator<Item = ModPath
                 matches!(tt, tt::TokenTree::Leaf(tt::Leaf::Punct(Punct { char: ',', .. })))
             })
             .into_iter()
+            .filter(|(comma, _)| !*comma)
             .map(|(_, tts)| {
                 let segments = tts.filter_map(|tt| match tt {
                     tt::TokenTree::Leaf(tt::Leaf::Ident(id)) => Some(id.as_name()),