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Postings from December 2011
2011/12/22 Olivier Mengué <perlbug-followup@perl.org>
> # New Ticket Created by Olivier Mengué
> # Please include the string: [perl #106864]
> # in the subject line of all future correspondence about this issue.
> # <URL: https://rt.perl.org:443/rt3/Ticket/Display.html?id=106864 >
>
>
> This is a bug report for perl from dolmen@cpan.org,
> generated with the help of perlbug 1.39 running under perl 5.10.1.
>
>
> -----------------------------------------------------------------
>
>
> With the following expression:
>
> my $x = sub { };
>
> the refcount of $x is 2 instead of 1.
> There is no such problem if the sub, instead of behind a simple sub,
> is a closure.
>
>perl -MDevel::Peek -e"for (1..3) { push @a, sub {}; } Dump($a[0]);"
SV = IV(0x57b650) at 0x57b654
REFCNT = 1
FLAGS = (ROK)
RV = 0x57b624
SV = PVCV(0x4a9dd4) at 0x57b624
REFCNT = 4
FLAGS = (PADMY,ANON,WEAKOUTSIDE,CVGV_RC)
COMP_STASH = 0x57b444 "main"
START = 0x4d2cb8 ===> 0
ROOT = 0x4d2c9c
GVGV::GV = 0x4a961c "main" :: "__ANON__"
FILE = "-e"
DEPTH = 0
FLAGS = 0x490
OUTSIDE_SEQ = 96
PADLIST = 0x4a954c
PADNAME = 0x4a960c(0x4a12f4) PAD = 0x4a98fc(0x4a0c64)
OUTSIDE = 0x57b6b4 (MAIN)
4, one for each element in @a, and one to the sub alive until sub {} needs
it next.
With closures, there would be 4 CVs with one reference each instead of 1 CV
with 4 reference.
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