Beefy Boxes and Bandwidth Generously Provided by pair Networks
Welcome to the Monastery

Comment on

( #3333=superdoc: print w/ replies, xml ) Need Help??

So I'm not supposed to mortalize the scalars that I push onto the array? Why is that? It makes my problem disappear, which I like, but I don't understand it, which I don't like. Any further thoughts are appreciated.

When an object is freed due to its refcount going to 0 all the items that object references have their refcount decremented in turn. So if you stuff an AV with mortalized SV'es the SVes could be freed before the AV itself tries to do the refcount decrement on the scalars it contains. Which then raises a warning as this kind of thing (at least from the perl side point of view) shouldn't happen.

So if you think about what happens in:

my @x; # @x has a refcount of 1 { my @array=(\@x); # @x has a refcount of 2 } # Free lexicals # @x has a refcount of 1

Its a recursive process:

procedure refcount_dec(item) if ( --item.refcount == 0 ) foreach sv in item.contents refcount_dec(sv) endfor if ( item.isref ) refcount_dec(item.references) endif endif endproc

In reply to Re: perlembed: mortalize an AV, get "Attempt to free unreferenced scalar" - don't mortalize, leaks memory by demerphq
in thread perlembed: mortalize an AV, get "Attempt to free unreferenced scalar" - don't mortalize, leaks memory by edan

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!
  • 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, 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
  • Outside of code tags, you may need to use entities for some characters:
            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.
  • Log In?

    What's my password?
    Create A New User
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others scrutinizing the Monastery: (13)
    As of 2015-03-04 15:47 GMT
    Find Nodes?
      Voting Booth?

      When putting a smiley right before a closing parenthesis, do you:

      Results (117 votes), past polls