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| -rw-r--r-- | pod/perldelta.pod | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/pod/perldelta.pod b/pod/perldelta.pod index 948deda7aa..89e823867e 100644 --- a/pod/perldelta.pod +++ b/pod/perldelta.pod @@ -45,6 +45,24 @@ XXX For a release on a stable branch, this section aspires to be: [ List each incompatible change as a =head2 entry ] +=head2 Modifiable variables are no longer permitted in constants + +Code like: + + my $var; + $sub = sub () { $var }; + +where C<$var> is referenced elsewhere in some sort of modiable context +now produces an exception when the sub is defined. + +This error can be avoided by adding a return to the sub definition: + + $sub = sub () { return $var }; + +This has been deprecated since perl 5.22. + +[perl #131138] + =head1 Deprecations XXX Any deprecated features, syntax, modules etc. should be listed here. |