From @mjdominus

Created by @mjdominus

This program dumps core:

use Memoize;
use Memoize::Storable;
$Memoize::Storable::Verbose = 1;

sub f {
my ($arg) = @_;
return (1, 2);
}

tie my %cache => 'Memoize::Storable', 'cache';
memoize 'f', LIST_CACHE => [HASH => \%cache];

print f('arg');

The output:

plover% perl m.pl
Memoize::Storable::TIEHASH(cache, )
Memoize::Storable::EXISTS(arg)
Memoize::Storable::STORE(arg ARRAY(0x81be800))
Memoize::Storable::FETCH(arg)
12Memoize::Storable::DESTROY()
Segmentation fault (core dumped)

The backtrace from the core file is:

#0 0x0809c844 in Perl_av_undef () at eval.c:41
#1 0x401c4697 in clean_retrieve_context ()
from /usr/local/lib/perl5/5.8.0/i586-linux/auto/Storable/Storable.so
#2 0x401c92ef in do_store ()
from /usr/local/lib/perl5/5.8.0/i586-linux/auto/Storable/Storable.so
#3 0x401c93f7 in pstore ()
from /usr/local/lib/perl5/5.8.0/i586-linux/auto/Storable/Storable.so
#4 0x401ccee4 in XS_Storable_pstore ()
from /usr/local/lib/perl5/5.8.0/i586-linux/auto/Storable/Storable.so
#5 0x080a39a3 in Perl_pp_entersub () at eval.c:41
#6 0x0809dbc2 in Perl_runops_standard () at eval.c:41
#7 0x0805f9f0 in S_call_body () at eval.c:41
#8 0x0805f7ca in Perl_call_sv () at eval.c:41
#9 0x080aa3c1 in Perl_sv_clear () at eval.c:41
#10 0x080aa8c9 in Perl_sv_free () at eval.c:41
#11 0x080a46f4 in S_visit () at eval.c:41
#12 0x080a4807 in Perl_sv_clean_objs () at eval.c:41
#13 0x0805d5b4 in perl_destruct () at eval.c:41
#14 0x0805c934 in main () at eval.c:41
#15 0x40070336 in __libc_start_main (main=0x805c8a0 <main>, argc=2,
ubp_av=0xbffff82c, init=0x805ba58 <_init>, fini=0x80f5800 <_fini>,
rtld_fini=0x4000d2fc <_dl_fini>, stack_end=0xbffff81c)
at ../sysdeps/generic/libc-start.c:129

I wanted to rule out the possibility of Memoize::Storable doing
something weird, so I added some debugging lines to the relevant
part as follows:

sub DESTROY {
require Carp if $Verbose;
my $self= shift;
print STDERR "Memoize::Storable::DESTROY(@_)\n" if $Verbose;
if ($self->{OPTIONS}{'nstore'}) {
Storable::nstore($self->{H}, $self->{FILENAME});
} else {
print STDERR "Memoize::Storable::DESTROY about to write $self->{H} to file $self->{FILENAME}\n";
use Data::Dumper;
print Dumper($self->{H});
Storable::store($self->{H}, $self->{FILENAME});
print STDERR "Memoize::Storable::DESTROY finished writing $self->{H} to file '$self->{FILENAME}'\n";
}
}

The output is now:

Memoize::Storable::TIEHASH(cache, )
Memoize::Storable::EXISTS(arg)
Memoize::Storable::STORE(arg ARRAY(0x81fff5c))
Memoize::Storable::FETCH(arg)
12Memoize::Storable::DESTROY()
Memoize::Storable::DESTROY about to write HASH(0x8113f74) to file cache
$VAR1 = {
'arg' => [
1,
2
]
};
Segmentation fault (core dumped)

Perl Info


Flags:
    category=library
    severity=high

Site configuration information for perl v5.8.0:

Configured by mjd at Thu Apr 17 11:57:37 EDT 2003.

Summary of my perl5 (revision 5.0 version 8 subversion 0) configuration:
  Platform:
    osname=linux, osvers=2.4.2-2, archname=i586-linux
    uname='linux plover.com 2.4.2-2 #1 sun apr 8 19:37:14 edt 2001 i586 unknown '
    config_args='-des'
    hint=previous, useposix=true, d_sigaction=define
    usethreads=undef use5005threads=undef useithreads=undef usemultiplicity=undef
    useperlio=define d_sfio=undef uselargefiles=define usesocks=undef
    use64bitint=undef use64bitall=undef uselongdouble=undef
    usemymalloc=n, bincompat5005=undef
  Compiler:
    cc='cc', ccflags ='-fno-strict-aliasing -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -I/usr/include/gdbm',
    optimize='-O2',
    cppflags='-fno-strict-aliasing -I/usr/local/include -I/usr/include/gdbm -fno-strict-aliasing -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -I/usr/include/gdbm -fno-strict-aliasing -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -I/usr/include/gdbm'
    ccversion='', gccversion='2.96 20000731 (Red Hat Linux 7.1 2.96-81)', gccosandvers=''
    intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=1234
    d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12
    ivtype='long', ivsize=4, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=8
    alignbytes=4, prototype=define
  Linker and Libraries:
    ld='cc', ldflags =' -L/usr/local/lib'
    libpth=/usr/local/lib /lib /usr/lib
    libs=-lnsl -lndbm -lgdbm -ldl -lm -lc -lcrypt -lutil
    perllibs=-lnsl -ldl -lm -lc -lcrypt -lutil
    libc=/lib/libc-2.2.2.so, so=so, useshrplib=false, libperl=libperl.a
    gnulibc_version='2.2.4'
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-rdynamic'
    cccdlflags='-fpic', lddlflags='-shared -L/usr/local/lib'

Locally applied patches:
    


@INC for perl v5.8.0:
    /usr/local/lib/perl5/5.8.0/i586-linux
    /usr/local/lib/perl5/5.8.0
    /usr/local/lib/perl5/site_perl/5.8.0/i586-linux
    /usr/local/lib/perl5/site_perl/5.8.0
    /usr/local/lib/perl5/site_perl/5.7.3
    /usr/local/lib/perl5/site_perl/5.7.2
    /usr/local/lib/perl5/site_perl/5.6.1
    /usr/local/lib/perl5/site_perl/5.6.0
    /usr/local/lib/perl5/site_perl
    .


Environment for perl v5.8.0:
    HOME=/home/mjd
    LANG=C
    LANGUAGE (unset)
    LD_LIBRARY_PATH=/lib:/usr/lib:/usr/X11R6/lib
    LOGDIR (unset)
    PATH=/home/mjd/bin:/usr/local/bin:/bin:/usr/bin:/usr/X11R6/bin:/usr/games:/sbin:/usr/sbin:/usr/local/bin/X11R6:/usr/local/bin/mh:/data/mysql/bin:/usr/local/bin/pbm:/usr/local/bin/ezmlm:/home/mjd/TPI/bin:/usr/local/teTeX/bin:/usr/local/mysql/bin
    PERL_BADLANG (unset)
    SHELL=/bin/bash

Core dump in Storable::store #8468

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