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51d5993)
Dir werden während des erstellens der Baumstruktur nach id indiziert,
und so gibt das potentielle Kollisionen
for my $node (@$data) {
my $id = $node->{id};
for my $node (@$data) {
my $id = $node->{id};
+ die "menu: node with name '$node->{name}' does not have an id" if !$id;
+
my $merge_to = $by_id->{$id};
if (!$merge_to) {
my $merge_to = $by_id->{$id};
if (!$merge_to) {