Item14615: XMLStoreContrib uses forbidden perl syntax.

Foswiki::Plugins::PlantUMLPlugin could not be loaded.  Errors were:
Experimental keys on scalar is now forbidden at /srv/www/foswiki/htdocs/lib/Foswiki/Contrib/XMLStoreContrib.pm line 227.
 at /srv/www/foswiki/htdocs/lib/Foswiki/Contrib/XMLStoreContrib.pm line 227.

-- GeorgeClark - 02 Feb 2018

The following patch is reported as fixing the issue. See Support.Question1923.

diff --git a/lib/Foswiki/Contrib/XMLStoreContrib.pm b/lib/Foswiki/Contrib/XMLStoreContrib.pm
index 329d265..65e12c9 100644
--- a/lib/Foswiki/Contrib/XMLStoreContrib.pm
+++ b/lib/Foswiki/Contrib/XMLStoreContrib.pm
@@ -224,8 +224,8 @@ sub save {
     # Remove all nodes associated with the updated topic from the most
     # recent document, then add the possibly changed nodes back in.
     my $diskroot = $doc->documentElement();
-    foreach my $web (sort keys $self->{'updated'}) {
-        foreach my $topic (sort keys $self->{'updated'}->{$web}) {
+    foreach my $web (sort keys %{ $self->{'updated'} }) {
+        foreach my $topic (sort keys %{ $self->{'updated'}->{$web} }) {
             my @nodes = $doc->findnodes(
                 "/" . $self->{'rootname'} . "/" . $self->{'nodename'} .
                 "[\@web='$web' and \@topic='$topic']");

-- GeorgeClark - 02 Feb 2018

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