I can confirm this behaviour on perl 5.18.1 with Scalar::Util 1.35. Looks like a bug to me.
Note that the correct behaviour can be obtained using the experimental “lexical subroutines” feature, introduced in perl 5.18.0 (see perlsub):
use feature 'lexical_subs';
use Scalar::Util 'weaken';
my sub frobnicate
my $local_ref = \&frobnicate;
# $ref = $local_ref;
weaken($ref = $local_ref);
12:49 >perl 775_SoPW.pl
The lexical_subs feature is experimental at 775_SoPW.pl line 10.
Can't use an undefined value as a subroutine reference at 775_SoPW.pl
Hope that helps,
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
Read Where should I post X? if you're not absolutely sure you're posting in the right place.
Please read these before you post! —
Posts may use any of the Perl Monks Approved HTML tags:
You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.
| & || & |
| < || < |
| > || > |
| [ || [ |
| ] || ] ||