From e8fcc651a3aa9af9d1a49a6cec64fc9bde737a86 Mon Sep 17 00:00:00 2001
From: Kyle M Hall <kyle@bywatersolutions.com>
Date: Wed, 23 Jul 2014 12:43:54 -0400
Subject: [PATCH] Bug 12629 - Software error when trying to merge records from
 different frameworks

Test Plan:
1) Choose a bib record that has the default framework.
2) Add a second record using that fast add framework.
3) Merge the records; switch to "Using framework: Default", and choose the original record (i.e. the one that had the default framework) as the merge reference. Clicking 'Next' will trigger the error.
4) Apply this patch
5) Repeat steps 1 - 3, no error should occur

Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
---
 Koha/Util/MARC.pm | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/Koha/Util/MARC.pm b/Koha/Util/MARC.pm
index 22774b63b2..63477ea4e3 100644
--- a/Koha/Util/MARC.pm
+++ b/Koha/Util/MARC.pm
@@ -43,8 +43,11 @@ sub createMergeHash {
     foreach my $field (@fields) {
         my $fieldtag = $field->tag();
         if ( $fieldtag < 10 ) {
-            if ( !defined($tagslib)
-                || $tagslib->{$fieldtag}->{'@'}->{'tab'} >= 0 )
+            if (
+                !defined($tagslib)
+                || ( defined( $tagslib->{$fieldtag} )
+                    && $tagslib->{$fieldtag}->{'@'}->{'tab'} >= 0 )
+              )
             {
                 push @array, {
                     tag   => $fieldtag,
-- 
2.39.5