From fb7e604538bb45bf6119ca264c332c9aa634ef31 Mon Sep 17 00:00:00 2001
From: Caleb Cartwright <caleb.cartwright@outlook.com>
Date: Sat, 28 Nov 2020 18:03:48 -0600
Subject: [PATCH] tests: backport an additional test case

---
 src/attr.rs                | 2 +-
 tests/target/issue_4545.rs | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)
 create mode 100644 tests/target/issue_4545.rs

diff --git a/src/attr.rs b/src/attr.rs
index 9f77941e551..dab9cabccdc 100644
--- a/src/attr.rs
+++ b/src/attr.rs
@@ -2,7 +2,7 @@
 
 use rustc_ast::ast;
 use rustc_ast::attr::HasAttrs;
-use rustc_span::{symbol::sym, BytePos, Span, Symbol, DUMMY_SP};
+use rustc_span::{symbol::sym, Span, Symbol};
 
 use self::doc_comment::DocCommentFormatter;
 use crate::comment::{contains_comment, rewrite_doc_comment, CommentStyle};
diff --git a/tests/target/issue_4545.rs b/tests/target/issue_4545.rs
new file mode 100644
index 00000000000..f87c8103657
--- /dev/null
+++ b/tests/target/issue_4545.rs
@@ -0,0 +1,5 @@
+#[derive(Debug, Foo<T>)]
+enum Bar {}
+
+#[derive(Debug, , Default)]
+struct Struct(i32);