From 434d109d9cd13741baa4a8560252e22620db6818 Mon Sep 17 00:00:00 2001
From: Protobuf Team Bot <protobuf-github-bot@google.com>
Date: Mon, 8 Jan 2024 08:21:44 -0800
Subject: [PATCH] Make utf8chars.chars iter return `impl Iterator +
 fmt::Debug`.

PiperOrigin-RevId: 596599987
---
 rust/string.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rust/string.rs b/rust/string.rs
index dfaa51918f..d2b5a5d6e3 100644
--- a/rust/string.rs
+++ b/rust/string.rs
@@ -344,7 +344,7 @@ impl ProtoStr {
     /// [`U+FFFD REPLACEMENT CHARACTER`].
     ///
     /// [`U+FFFD REPLACEMENT CHARACTER`]: std::char::REPLACEMENT_CHARACTER
-    pub fn chars(&self) -> impl Iterator<Item = char> + '_ {
+    pub fn chars(&self) -> impl Iterator<Item = char> + '_ + fmt::Debug {
         Utf8Chunks::new(self.as_bytes()).flat_map(|chunk| {
             let mut yield_replacement_char = !chunk.invalid().is_empty();
             chunk.valid().chars().chain(iter::from_fn(move || {