From 7c8ccdecd5c2f0eb188a8aab8a3228ba81f2b0f3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Arnaud=20Cogolu=C3=A8gnes?=
 <514737+acogoluegnes@users.noreply.github.com>
Date: Mon, 23 Jun 2025 17:28:36 +0200
Subject: [PATCH] Support cross-version overview in stream SAC coordinator

When the state comes from V4 and the current module is V5.

References #14106

(cherry picked from commit 4e7e0f0f1d7ec4136ad4882943adf3ebd0d8face)
---
 deps/rabbit/src/rabbit_stream_sac_coordinator.erl | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/deps/rabbit/src/rabbit_stream_sac_coordinator.erl b/deps/rabbit/src/rabbit_stream_sac_coordinator.erl
index 5f9ceec144..6888327528 100644
--- a/deps/rabbit/src/rabbit_stream_sac_coordinator.erl
+++ b/deps/rabbit/src/rabbit_stream_sac_coordinator.erl
@@ -207,7 +207,7 @@ group_consumers(VirtualHost, Stream, Reference, InfoKeys) ->
 -spec overview(state() | undefined) -> map() | undefined.
 overview(undefined) ->
     undefined;
-overview(#?MODULE{groups = Groups}) ->
+overview(#?MODULE{groups = Groups} = S) when ?IS_STATE_REC(S) ->
     GroupsOverview =
         maps:map(fun(_,
                      #group{consumers = Consumers, partition_index = Idx}) ->
@@ -215,7 +215,9 @@ overview(#?MODULE{groups = Groups}) ->
                       partition_index => Idx}
                  end,
                  Groups),
-    #{num_groups => map_size(Groups), groups => GroupsOverview}.
+    #{num_groups => map_size(Groups), groups => GroupsOverview};
+overview(S) ->
+    rabbit_stream_sac_coordinator_v4:overview(S).
 
 -spec init_state() -> state().
 init_state() ->