File 0477-snmp-Fix-optional-callbacks-check.patch of Package erlang

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File 0477-snmp-Fix-optional-callbacks-check.patch of Package erlang

From 673abdddae987a7fdc795c67e0c3abca3c1468cb Mon Sep 17 00:00:00 2001
From: Lukas Larsson <lukas@erlang.org>
Date: Tue, 3 Oct 2023 14:55:07 +0200
Subject: [PATCH 2/5] snmp: Fix optional callbacks check

---
 lib/snmp/src/misc/snmp_misc.erl | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/lib/snmp/src/misc/snmp_misc.erl b/lib/snmp/src/misc/snmp_misc.erl
index 18d5800651..291e35fcf2 100644
--- a/lib/snmp/src/misc/snmp_misc.erl
+++ b/lib/snmp/src/misc/snmp_misc.erl
@@ -84,7 +84,12 @@ verify_behaviour(Behaviour, UserMod)
     case (catch UserMod:module_info(exports)) of
         Exps when is_list(Exps) ->
             Callbacks = Behaviour:behaviour_info(callbacks),
-            (catch verify_behaviour2(Callbacks, Exps));
+            OptionalCallbacks =
+                case Behaviour:behaviour_info(optional_callbacks) of
+                    undefined -> [];
+                    OC -> OC
+                end,
+            (catch verify_behaviour2(Callbacks -- OptionalCallbacks, Exps));
         _ ->
             {error, {bad_module, UserMod}}
     end;
-- 
2.35.3

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File 0477-snmp-Fix-optional-callbacks-check.patch of Package erlang

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