From e8f1d57d8021d51c5b5d5eb17791c680ca770791 Mon Sep 17 00:00:00 2001
From: Guillaume Gomez <guillaume.gomez@huawei.com>
Date: Sat, 6 Nov 2021 19:41:33 +0100
Subject: [PATCH] Fix last doc code comment being removed if it only had one
 character

---
 compiler/rustc_ast/src/util/comments.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/compiler/rustc_ast/src/util/comments.rs b/compiler/rustc_ast/src/util/comments.rs
index 542a330a03141..c40aec4b671dd 100644
--- a/compiler/rustc_ast/src/util/comments.rs
+++ b/compiler/rustc_ast/src/util/comments.rs
@@ -38,7 +38,7 @@ pub fn beautify_doc_string(data: Symbol) -> Symbol {
             i += 1;
         }
         // like the first, a last line of all stars should be omitted
-        if j > i && lines[j - 1].chars().skip(1).all(|c| c == '*') {
+        if j > i && !lines[j - 1].is_empty() && lines[j - 1].chars().all(|c| c == '*') {
             j -= 1;
         }