Your code introduces a bug not in the original, here:

      overload::StrVal($_[0]) =~ /0x(\w+)/;

[download]

You use the same regexp as the original, but because you are no longer blessing into a known package the regexp may match the package name instead of the address. Indeed, a bug common enough to warrant the introduction of a new fatal error in perl-5.8 would give rise to exactly that situation:

  zen% cat t0
  package A; $x = bless {}; $y = bless [], $x; print "$y";

  zen% /opt/perl-5.6.1/bin/perl -wl t0
  A=HASH(0x811198c)=ARRAY(0x8111a94)

  zen% /opt/perl-5.8.0/bin/perl -wl t0
  Attempt to bless into a reference at t0 line 1.

[download]

Admittedly it is harder to get an overloaded object inadvertently in the wrong class like this, but "0x" is not so unusual a sequence of characters that it is fair to assume it will never appear in a legitimate package name. In any case it is easy enough to fix, with either /.*0x(\w+)/ or /0x(\w+)\)\z/.

Hugo

In reply to Re^5: A Scalar::Util::refaddr Oddity by hv
in thread A Scalar::Util::refaddr Oddity by Zaxo

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • 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:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, 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, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.