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Diffstat (limited to 'ext/Data/Dumper/Dumper.pm')
| -rw-r--r-- | ext/Data/Dumper/Dumper.pm | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/ext/Data/Dumper/Dumper.pm b/ext/Data/Dumper/Dumper.pm index f51b2438d6..c00b218f2a 100644 --- a/ext/Data/Dumper/Dumper.pm +++ b/ext/Data/Dumper/Dumper.pm @@ -1193,6 +1193,17 @@ XSUB implementation does not support them. SCALAR objects have the weirdest looking C<bless> workaround. +=head2 NOTE + +Starting from Perl 5.8.1 different runs of Perl will have different +ordering of hash keys. The change was done for greater security, +see L<perlsec/"Algorithmic Complexity Attacks">. This means that +different runs of Perl will have different Data::Dumper outputs if +the data contains hashes. If you need to have identical Data::Dumper +outputs from different runs of Perl, use the environment variable +PERL_HASH_SEED, see L<perlrun/PERL_HASH_SEED>. Using this restores +the old (platform-specific) ordering: an even prettier solution might +be to use the C<Sortkeys> filter of Data::Dumper. =head1 AUTHOR @@ -1202,7 +1213,6 @@ Copyright (c) 1996-98 Gurusamy Sarathy. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. - =head1 VERSION Version 2.12 (unreleased) |