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[perl #119311] pads being reused in coderefs called from DESTROY
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From:
Jesse Luehrs
Date:
August 15, 2013 23:18
Subject:
[perl #119311] pads being reused in coderefs called from DESTROY
Message ID:
rt-3.6.HEAD-2552-1376608662-10.119311-75-0@perl.org
# New Ticket Created by Jesse Luehrs
# Please include the string: [perl #119311]
# in the subject line of all future correspondence about this issue.
# <URL: https://rt.perl.org:443/rt3/Ticket/Display.html?id=119311 >
This is a bug report for perl from doy@tozt.net,
generated with the help of perlbug 1.39 running under perl 5.18.0.
-----------------------------------------------------------------
[Please describe your issue here]
Given this script:
sub foo {
my ($block, $other) = @_;
my $got;
die "this is clearly a bug" if $got;
$got = $other;
$block->();
}
{
package Foo;
sub DESTROY {
::foo(sub { }, 1);
return;
}
}
# "exit(0) unless fork" also triggers the bug,
# but a bare "fork" doesn't
foo(sub { my $o = bless {}, 'Foo'; exit(0) if fork }, 1);
$got is keeping its previous value when foo() is called from the DESTROY
method. This has been broken since 5.8.0, a bisect points to 840a7b70 as
where the bug was introduced:
commit 840a7b70755d06740715e982aa756f9d77203c4e
Author: Ilya Zakharevich <ilya@math.berkeley.edu>
Date: Mon Dec 4 19:40:25 2000 -0500
Re: [PATCH] The largest hoax of all times?
Date: Tue, 5 Dec 2000 00:40:25 -0500
Message-ID: <20001205004025.A4050@monk.mps.ohio-state.edu>
Subject: Re: [PATCH] The largest hoax of all times?
From: Ilya Zakharevich <ilya@math.ohio-state.edu>
Date: Mon, 4 Dec 2000 23:55:53 -0500
Message-ID: <20001204235553.A1140@monk.mps.ohio-state.edu>
Subject: Re: [PATCH] The largest hoax of all times?
From: Ilya Zakharevich <ilya@math.ohio-state.edu>
Date: Tue, 5 Dec 2000 01:28:45 -0500
Message-ID: <20001205012844.A4227@monk.mps.ohio-state.edu>
Fix the unpredictable order of DESTROYs.
p4raw-id: //depot/perl@7991
[Please do not change anything below this line]
-----------------------------------------------------------------
---
Flags:
category=core
severity=medium
---
Site configuration information for perl 5.18.0:
Configured by doy at Sat Aug 3 17:08:22 EDT 2013.
Summary of my perl5 (revision 5 version 18 subversion 0) configuration:
Platform:
osname=linux, osvers=3.9.3-x86_64-linode33, archname=x86_64-linux
uname='linux tozt 3.9.3-x86_64-linode33 #1 smp mon may 20 10:22:57 edt 2013 x86_64 gnulinux '
config_args='-de -Dprefix=/home/doy/perl5/perlbrew/perls/perl-5.18 -Aeval:scriptdir=/home/doy/perl5/perlbrew/perls/perl-5.18/bin'
hint=recommended, useposix=true, d_sigaction=define
useithreads=undef, usemultiplicity=undef
useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=undef
use64bitint=define, use64bitall=define, uselongdouble=undef
usemymalloc=n, bincompat5005=undef
Compiler:
cc='cc', ccflags ='-fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
optimize='-O2',
cppflags='-fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include'
ccversion='', gccversion='4.8.1 20130725 (prerelease)', gccosandvers=''
intsize=4, longsize=8, ptrsize=8, doublesize=8, byteorder=12345678
d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=16
ivtype='long', ivsize=8, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=8
alignbytes=8, prototype=define
Linker and Libraries:
ld='cc', ldflags =' -fstack-protector -L/usr/local/lib'
libpth=/usr/local/lib /lib/../lib /usr/lib/../lib /lib /usr/lib /lib64 /usr/lib64
libs=-lnsl -lgdbm -ldb -ldl -lm -lcrypt -lutil -lc -lgdbm_compat
perllibs=-lnsl -ldl -lm -lcrypt -lutil -lc
libc=/lib/libc-2.17.so, so=so, useshrplib=false, libperl=libperl.a
gnulibc_version='2.17'
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E'
cccdlflags='-fPIC', lddlflags='-shared -O2 -L/usr/local/lib -fstack-protector'
Locally applied patches:
---
@INC for perl 5.18.0:
/home/doy/perl5/perlbrew/perls/perl-5.18/lib/site_perl/5.18.0/x86_64-linux
/home/doy/perl5/perlbrew/perls/perl-5.18/lib/site_perl/5.18.0
/home/doy/perl5/perlbrew/perls/perl-5.18/lib/5.18.0/x86_64-linux
/home/doy/perl5/perlbrew/perls/perl-5.18/lib/5.18.0
.
---
Environment for perl 5.18.0:
HOME=/home/doy
LANG=en_US.UTF-8
LANGUAGE (unset)
LD_LIBRARY_PATH (unset)
LOGDIR (unset)
PATH=/home/doy/perl5/perlbrew/bin:/home/doy/perl5/perlbrew/perls/perl-5.18/bin:/home/doy/.bin/nethack:/home/doy/.bin:/usr/local/sbin:/usr/local/bin:/usr/lib/ccache/bin:/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/bin/vendor_perl:/usr/bin/core_perl
PERLBREW_BASHRC_VERSION=0.64
PERLBREW_HOME=/home/doy/.perlbrew
PERLBREW_MANPATH=/home/doy/perl5/perlbrew/perls/perl-5.18/man
PERLBREW_PATH=/home/doy/perl5/perlbrew/bin:/home/doy/perl5/perlbrew/perls/perl-5.18/bin
PERLBREW_PERL=perl-5.18
PERLBREW_ROOT=/home/doy/perl5/perlbrew
PERLBREW_VERSION=0.64
PERL_BADLANG (unset)
PERL_CPANM_OPT=-q --mirror file:///home/doy/perl5/minicpan/ --mirror http://mirrors.kernel.org/cpan/ --mirror http://cpan.metacpan.org/ --prompt
SHELL=/bin/zsh
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