From a818029b8d8bdf60bff8b9caf16744ff46346631 Mon Sep 17 00:00:00 2001
From: Xinye Tao <xinye.tao@metabit-trading.com>
Date: Tue, 25 Feb 2025 13:37:55 +0800
Subject: [PATCH] harden ref mut according to edition 2024

Signed-off-by: Xinye Tao <xinye.tao@metabit-trading.com>
---
 prost-build/src/message_graph.rs | 10 +++-------
 prost-derive/src/lib.rs          |  2 +-
 2 files changed, 4 insertions(+), 8 deletions(-)

diff --git a/prost-build/src/message_graph.rs b/prost-build/src/message_graph.rs
index 7d43aeceb..92486c742 100644
--- a/prost-build/src/message_graph.rs
+++ b/prost-build/src/message_graph.rs
@@ -41,15 +41,11 @@ impl MessageGraph {
     }
 
     fn get_or_insert_index(&mut self, msg_name: String) -> NodeIndex {
-        let MessageGraph {
-            ref mut index,
-            ref mut graph,
-            ..
-        } = *self;
         assert_eq!(b'.', msg_name.as_bytes()[0]);
-        *index
+        *self
+            .index
             .entry(msg_name.clone())
-            .or_insert_with(|| graph.add_node(msg_name))
+            .or_insert_with(|| self.graph.add_node(msg_name))
     }
 
     /// Adds message to graph IFF it contains a non-repeated field containing another message.
diff --git a/prost-derive/src/lib.rs b/prost-derive/src/lib.rs
index bc56d2249..bd5f32357 100644
--- a/prost-derive/src/lib.rs
+++ b/prost-derive/src/lib.rs
@@ -441,7 +441,7 @@ fn try_oneof(input: TokenStream) -> Result<TokenStream, Error> {
         quote! {
             #tag => {
                 match field {
-                    ::core::option::Option::Some(#ident::#variant_ident(ref mut value)) => {
+                    &mut ::core::option::Option::Some(#ident::#variant_ident(ref mut value)) => {
                         #merge
                     },
                     _ => {