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commit    e56d717d8a23c48e4ab27b6bd6815c50dc3a378a
Author:   Alvaro Herrera <alvherre@alvh.no-ip.org>
Date:     Mon Apr 13 23:54:09 2020 +0000
First released in: 13.0

    Silence Perl warning
    
    Now that warnings are enabled across the board, this code that tries to
    print an undef variable emits one.  Silently printing the empty string
    achieves the previous behavior.
    
    Author: Álvaro Herrera <alvherre@alvh.no-ip.org>
    Reviewed-by: Andrew Dunstan <andrew.dunstan@2ndquadrant.com>
    Discussion: https://postgr.es/m/E1jO1VT-0008Qk-TM@gemulon.postgresql.org


 doc/src/sgml/mk_feature_tables.pl | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/mk_feature_tables.pl b/doc/src/sgml/mk_feature_tables.pl
index ee158cb1969..a9dfebfbb31 100644
--- a/doc/src/sgml/mk_feature_tables.pl
+++ b/doc/src/sgml/mk_feature_tables.pl
@@ -54,7 +54,9 @@ while (<$feat>)
 	{
 		print "  <entry>$feature_id</entry>\n";
 	}
-	print "  <entry>" . $feature_packages{$feature_id} . "</entry>\n";
+	print "  <entry>",
+		  defined($feature_packages{$feature_id}) ? $feature_packages{$feature_id} : "",
+		  "</entry>\n";
 	if ($subfeature_id)
 	{
 		print "  <entry>$subfeature_name</entry>\n";


[parent: bc3087b626d1]