X-Git-Url: http://www.git.stargrave.org/?a=blobdiff_plain;f=lib%2FPublicInbox%2FContentId.pm;h=8d77934f20a51665f974da408d7195f26509ec15;hb=95bdac7f09c69036efed537a4d03d5bdd2ae4eb6;hp=eb937a0e722982937f4a93619c00330f7b4d15b2;hpb=65e3cc8f6cc73e45db827cbeee4ccecbf1502496;p=public-inbox.git

diff --git a/lib/PublicInbox/ContentId.pm b/lib/PublicInbox/ContentId.pm
index eb937a0e..8d77934f 100644
--- a/lib/PublicInbox/ContentId.pm
+++ b/lib/PublicInbox/ContentId.pm
@@ -1,4 +1,4 @@
-# Copyright (C) 2018-2019 all contributors <meta@public-inbox.org>
+# Copyright (C) 2018-2020 all contributors <meta@public-inbox.org>
 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
 
 # Unstable internal API.
@@ -60,15 +60,11 @@ sub content_digest ($) {
 	# References: and In-Reply-To: get used interchangeably
 	# in some "duplicates" in LKML.  We treat them the same
 	# in SearchIdx, so treat them the same for this:
-	my %seen;
-	foreach my $mid (@{mids($hdr)}) {
-		# do NOT consider the Message-ID as part of the content_id
-		# if we got here, we've already got Message-ID reuse
-		$seen{$mid} = 1;
-	}
+	# do NOT consider the Message-ID as part of the content_id
+	# if we got here, we've already got Message-ID reuse
+	my %seen = map { $_ => 1 } @{mids($hdr)};
 	foreach my $mid (@{references($hdr)}) {
-		next if $seen{$mid};
-		$dig->add("ref\0$mid\0");
+		$dig->add("ref\0$mid\0") unless $seen{$mid}++;
 	}
 
 	# Only use Sender: if From is not present