From 643de23a1bf15d8e0cd45551297eed4624e45e26 Mon Sep 17 00:00:00 2001
From: Dennis Felsing <dennis@felsing.org>
Date: Thu, 16 Apr 2026 05:07:31 +0000
Subject: [PATCH] Mark metadata wrapper structs as repr(transparent)

C arrays are directly cast, which is only guaranteed to work with
repr(transparent)
---
 src/metadata.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/metadata.rs b/src/metadata.rs
index 78667d913..2c09e4a7f 100644
--- a/src/metadata.rs
+++ b/src/metadata.rs
@@ -11,6 +11,7 @@ use crate::error::IsError;
 use crate::util::{KafkaDrop, NativePtr};
 
 /// Broker metadata information.
+#[repr(transparent)]
 pub struct MetadataBroker(RDKafkaMetadataBroker);
 
 impl MetadataBroker {
@@ -45,6 +46,7 @@ impl fmt::Debug for MetadataBroker {
 }
 
 /// Partition metadata information.
+#[repr(transparent)]
 pub struct MetadataPartition(RDKafkaMetadataPartition);
 
 impl MetadataPartition {
@@ -96,6 +98,7 @@ impl fmt::Debug for MetadataPartition {
 }
 
 /// Topic metadata information.
+#[repr(transparent)]
 pub struct MetadataTopic(RDKafkaMetadataTopic);
 
 impl MetadataTopic {