From 957ed1b5d6d05e8a5ead13f3a601349b0eb8e74e Mon Sep 17 00:00:00 2001
From: Rouzax <GitHub@mgdn.nl>
Date: Tue, 12 May 2026 14:32:26 +0200
Subject: [PATCH] Guard ReplayGain and URL tag processing against arrayrefs

Some ID3v2 TXXX-derived tags may arrive as arrayrefs if
Audio::Scan returns multi-value frames. Add defensive guards
using the established pattern from elsewhere in Schema.pm
to take the first element when an arrayref is encountered.

Covers: REPLAYGAIN_TRACK_GAIN, REPLAYGAIN_TRACK_PEAK,
REPLAYGAIN_ALBUM_GAIN, REPLAYGAIN_ALBUM_PEAK, and URL.

Signed-off-by: Rouzax <GitHub@mgdn.nl>
---
 Slim/Schema.pm | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Slim/Schema.pm b/Slim/Schema.pm
index a04164313d..e50fbed8a2 100644
--- a/Slim/Schema.pm
+++ b/Slim/Schema.pm
@@ -1305,6 +1305,7 @@ sub _createOrUpdateAlbum {
 		# Bug 8034, this used to not change gain/peak values if they were already set,
 		# bug we do want to update album gain tags if they are changed.
 		if ( $attributes->{$gainTag} ) {
+			$attributes->{$gainTag} = $attributes->{$gainTag}[0] if ref $attributes->{$gainTag} eq 'ARRAY';
 			$attributes->{$gainTag} =~ s/\s*dB//gi;
 			$attributes->{$gainTag} =~ s/\s//g;  # bug 15965
 			$attributes->{$gainTag} =~ s/,/\./g; # bug 6900, change comma to period
@@ -2802,6 +2803,7 @@ sub _preCheckAttributes {
 	# Bug: 2605 - Get URL out of the attributes - some programs, and
 	# services such as www.allofmp3.com add it.
 	if ($attributes->{'URL'}) {
+		$attributes->{'URL'} = $attributes->{'URL'}[0] if ref $attributes->{'URL'} eq 'ARRAY';
 
 		push @$rawcomments, delete $attributes->{'URL'};
 	}
@@ -2921,6 +2923,7 @@ sub processReplayGainTags {
 		   $shortTag =~ s/^REPLAYGAIN_TRACK_(\w+)$/REPLAY_$1/;
 
 		if (defined $attributes->{$gainTag}) {
+			$attributes->{$gainTag} = $attributes->{$gainTag}[0] if ref $attributes->{$gainTag} eq 'ARRAY';
 
 			$attributes->{$shortTag} = delete $attributes->{$gainTag};
 			$attributes->{$shortTag} =~ s/\s*dB//gi;