This Perl segfaults if a declaration of the to-be-aliased package
precedes the aliasing itself. Per buildfarm members lapwing and wrasse.
Like commit
20911775de4ab7ac3ecc68bd714cb3ed0fd68b6a, back-patch to v10
(all supported versions).
Discussion: https://postgr.es/m/
20220625171533.GA2012493@rfd.leadboat.com
# package the same symbol table as the older package. See PostgresNode::new
# for supporting heuristics.
-package PostgreSQL::Test::Cluster;
-
use strict;
use warnings;
-
-use PostgresNode;
BEGIN { *PostgreSQL::Test::Cluster:: = \*PostgresNode::; }
-
-use Exporter 'import';
+use PostgresNode ();
1;
# Allow use of release 15+ Perl package name in older branches, by giving that
# package the same symbol table as the older package.
-package PostgreSQL::Test::Utils;
-
use strict;
use warnings;
-
-use TestLib;
BEGIN { *PostgreSQL::Test::Utils:: = \*TestLib::; }
-
-use Exporter 'import';
+use TestLib ();
1;