From c59e876bb37ad690090d83e92a7799b75b1a3f49 Mon Sep 17 00:00:00 2001
From: David Tolnay <dtolnay@gmail.com>
Date: Sun, 10 Nov 2024 23:23:09 -0800
Subject: [PATCH] Produce a separate warning for every colliding name

---
 serde_derive/src/de.rs | 20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)

diff --git a/serde_derive/src/de.rs b/serde_derive/src/de.rs
index 2f18dd8b1..979964cd0 100644
--- a/serde_derive/src/de.rs
+++ b/serde_derive/src/de.rs
@@ -2217,7 +2217,11 @@ fn deserialize_identifier(
         let ident = &field.ident;
         let aliases = field.aliases;
         // `aliases` also contains a main name
-        quote!(#(#aliases)|* => _serde::__private::Ok(#this_value::#ident))
+        quote! {
+            #(
+                #aliases => _serde::__private::Ok(#this_value::#ident),
+            )*
+        }
     });
     let bytes_mapping = deserialized_fields.iter().map(|field| {
         let ident = &field.ident;
@@ -2226,7 +2230,11 @@ fn deserialize_identifier(
             .aliases
             .iter()
             .map(|alias| Literal::byte_string(alias.value.as_bytes()));
-        quote!(#(#aliases)|* => _serde::__private::Ok(#this_value::#ident))
+        quote! {
+            #(
+                #aliases => _serde::__private::Ok(#this_value::#ident),
+            )*
+        }
     });
 
     let expecting = expecting.unwrap_or(if is_variant {
@@ -2424,7 +2432,7 @@ fn deserialize_identifier(
                 __E: _serde::de::Error,
             {
                 match __value {
-                    #(#str_mapping,)*
+                    #(#str_mapping)*
                     _ => {
                         #value_as_borrowed_str_content
                         #fallthrough_borrowed_arm
@@ -2437,7 +2445,7 @@ fn deserialize_identifier(
                 __E: _serde::de::Error,
             {
                 match __value {
-                    #(#bytes_mapping,)*
+                    #(#bytes_mapping)*
                     _ => {
                         #bytes_to_str
                         #value_as_borrowed_bytes_content
@@ -2462,7 +2470,7 @@ fn deserialize_identifier(
             __E: _serde::de::Error,
         {
             match __value {
-                #(#str_mapping,)*
+                #(#str_mapping)*
                 _ => {
                     #value_as_str_content
                     #fallthrough_arm
@@ -2475,7 +2483,7 @@ fn deserialize_identifier(
             __E: _serde::de::Error,
         {
             match __value {
-                #(#bytes_mapping,)*
+                #(#bytes_mapping)*
                 _ => {
                     #bytes_to_str
                     #value_as_bytes_content