When we reference a typeglob as follows: 
sub code_ref_for_subroutine {
    my($proto, $name) = @_;
    do {
    no strict;
    local(*p) = *{$proto->package_name . '::'};
    if (exists($p{$name})) {
        local(*n) = $p{$name};
        return *n{CODE}
        if defined(*n{CODE});
    }
    };
   return;
}

[download]

Global lexicals disappear sometimes. This has been an ongoing problem, which I believe is caused by the semi-autovivification in the defined(*n{CODE}).

I sent a perlbug a while ago, but got no answer. We work around the problem by not using code_ref_for_subroutine, but it's very useful for the way we code.

We've got a variety of unit tests for code_ref_for_subroutine, but none which reproduces the problem. It only seems to happen when running under mod_perl.

Rob

In reply to typeglob reference deletes global lexical by robnagler

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.