From 9f50ad9cf5f4bc3dfaab132a99c0bbf3a6f7cb1a Mon Sep 17 00:00:00 2001
From: "Dirk-Jan C. Binnema" <djcb@djcbsoftware.nl>
Date: Thu, 8 Dec 2022 19:31:07 +0200
Subject: [PATCH] mu-query-match-decider: add 'Related' to flags

We were _replacing_ the flags (such as Duplicate), but we should add to
them instead.

Add a unit-test for this.
---
 lib/mu-query-match-deciders.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/mu-query-match-deciders.cc b/lib/mu-query-match-deciders.cc
index b988b970..999d6093 100644
--- a/lib/mu-query-match-deciders.cc
+++ b/lib/mu-query-match-deciders.cc
@@ -180,7 +180,7 @@ struct MatchDeciderRelated final : public MatchDecider {
 
 		auto qm{make_query_match(doc)};
 		if (should_include(qm)) {
-			qm.flags = QueryMatch::Flags::Related;
+			qm.flags |= QueryMatch::Flags::Related;
 			decider_info_.matches.emplace(doc.get_docid(), std::move(qm));
 			return true;
 		} else