2016-10-28 12:06 UTC

View Issue Details Jump to Notes ]
IDProjectCategoryView StatusLast Update
0004987CentOS-5perlpublic2011-07-20 14:25
StatusclosedResolutionno change required 
Product Version5.6 
Target VersionFixed in Version 
Summary0004987: perl-5.8.8-32.el5_6.3.i386 -- Update -- broken -> Scalar::Util::weaken gone
DescriptionMost recent perl update (I got it 2am 19th) aparrently removed Scalar::Util::weaken.

Many packages depend on this module like Memcached/Fast.pm.

Subtle failures ensued :

Undefined subroutine &Scalar::Util::weaken called at /usr/lib/perl5/site_perl/5.8.8/i386-linux-thread-multi/Cache/Memcached/Fast.pm line 591.\nCompilation failed in require ...

Reproduce easily every time with perl-5.8.8-32.el5_6.3.i386 by trying to install :

perl -MCPAN -e "install Task::Weaken"

subsequently fails :

    A CPAN module critically requires a function
    (Scalar::Util::weaken) that should exist in your
    Scalar::Util module but doesn't.

    This probably happened because you are using a Perl
    provided by a binary package from a vendor, and this
    vendor has packaged Perl incorrectly.

Additional InformationFull Transcript of testcase(s) attached in txtfile.
TagsNo tags attached.
Attached Files
  • txt file icon centos-5.6-perl-scalar_util_weaken-error-transcript.txt (5,586 bytes) 2011-07-19 22:45 -
    ### begin. going from perl perl-5.8.8-32.el5_5.2 base where all is OK.
    [hostname]# yum check-update
    Loaded plugins: fastestmirror
    Loading mirror speeds from cached hostfile
    perl.i386                                                             4:5.8.8-32.el5_6.3                                                              updates
    ### done a yum upgrade - just the one perl package, and only from official repo.
    [Tue Jul 19 23:21:35 2011] [error] Undefined subroutine &Scalar::Util::weaken called at /usr/lib/perl5/site_perl/5.8.8/i386-linux-thread-multi/Cache/Memcached/Fast.pm line 591.\n
    ### attempt 1 to see if we can get an offical error about the problem...
    cpan> install Scalar::Util
    CPAN: Storable loaded ok
    Going to read /root/.cpan/Metadata
      Database was generated on Tue, 19 Jul 2011 16:31:35 GMT
    Scalar::Util is up to date.
    cpan> test Scalar::Util
    Running test for module Scalar::Util
    Running make for G/GB/GBARR/Scalar-List-Utils-1.23.tar.gz
    CPAN: Digest::MD5 loaded ok
    Checksum for /root/.cpan/sources/authors/id/G/GB/GBARR/Scalar-List-Utils-1.23.tar.gz ok
    Scanning cache /root/.cpan/build for sizes
    All tests successful, 4 subtests skipped.
    Files=38, Tests=475,  2 wallclock secs ( 1.11 cusr +  0.45 csys =  1.56 CPU)
      /usr/bin/make test -- OK
    ### attempt 2 to see if we can get an offical error about the problem...
    cpan> install Task::Weaken
    Running install for module Task::Weaken
    Running make for A/AD/ADAMK/Task-Weaken-1.04.tar.gz
    Checksum for /root/.cpan/sources/authors/id/A/AD/ADAMK/Task-Weaken-1.04.tar.gz ok
    Removing previously used /root/.cpan/build/Task-Weaken-1.04
      CPAN.pm: Going to build A/AD/ADAMK/Task-Weaken-1.04.tar.gz
        A CPAN module critically requires a function
        (Scalar::Util::weaken) that should exist in your
        Scalar::Util module but doesn't.
        This probably happened because you are using a Perl
        provided by a binary package from a vendor, and this
        vendor has packaged Perl incorrectly.
        I have checked for a couple of potential workarounds
        but none of them appear to be usable in your
        I will try a last-ditch option anyway, but the most
        likely result is a number of noisily failing tests
        If this happens, you will need to contact technical
        support for your vendor and report the broken Perl,
        so that they can repair it.
        Please refer them to the documentation for the
        'Task::Weaken' CPAN module, which explains the problem
        and how they can fix it.
        I'm going to wait for about a minute now so you have time
        to read this message
    ### having another module complaining - we are sure it is not just cache::memcached::fast
    [Tue Jul 19 23:27:54 2011] [error] Undefined subroutine &Scalar::Util::weaken called at /usr/lib/perl5/site_perl/5.8.8/i386-linux-thread-multi/Cache/Memcached/Fast.pm line 591.\n
    ### rollback to where we started and evidence that Task::Weaken works with previous release
    [hostname]# rpm -e --nodeps perl # erase new perl
    [hostname]# perl -v
    -bash: /usr/bin/perl: No such file or directory
    [hostname]# rpm -i /var/spool/repackage/perl-5.8.8-32.el5_5.2.i386.rpm
    error: unpacking of archive failed on file /usr/bin/a2p;4e26055d: cpio: MD5 sum mismatch
    [hostname]# rpm -i --nomd5 /var/spool/repackage/perl-5.8.8-32.el5_5.2.i386.rpm
    [hostname]# echo $?
    [hostname]# perl -v
    This is perl, v5.8.8 built for i386-linux-thread-multi
    Copyright 1987-2006, Larry Wall
    Perl may be copied only under the terms of either the Artistic License or the
    GNU General Public License, which may be found in the Perl 5 source kit.
    Complete documentation for Perl, including FAQ lists, should be found on
    this system using "man perl" or "perldoc perl".  If you have access to the
    Internet, point your browser at http://www.perl.org/, the Perl Home Page.
    [hostname]# rpm -qa |grep perl-5.8
    [hostname]# perl -MCPAN -e "install Task::Weaken"
    CPAN: Storable loaded ok
    Going to read /root/.cpan/Metadata
      Database was generated on Tue, 19 Jul 2011 16:31:35 GMT
    Running install for module Task::Weaken
    Running make for A/AD/ADAMK/Task-Weaken-1.04.tar.gz
    Files=2, Tests=21,  1 wallclock secs ( 0.03 usr  0.01 sys +  0.05 cusr  0.01 csys =  0.10 CPU)
    Result: PASS
      /usr/bin/make test -- OK
    Running make install
    Manifying blib/man3/Task::Weaken.3pm
    Installing /usr/lib/perl5/site_perl/5.8.8/Task/Weaken.pm
    Installing /usr/share/man/man3/Task::Weaken.3pm
    Appending installation info to /usr/lib/perl5/5.8.8/i386-linux-thread-multi/perllocal.pod
      /usr/bin/make install  -- OK
    [hostname]# echo $?
    ## end. thanks for your time.




wolfy (developer)

I could not reproduce on a freshly installed C5.6/x86_64

[root@pc68 ~]# rpm -q perl --qf "%{name}-%{version}.%{release}.%{arch}\n"

[root@pc68 ~]# perl -MCPAN -e "install Task::Weaken"
Running make for A/AD/ADAMK/Task-Weaken-1.04.tar.gz
  Is already unwrapped into directory /root/.cpan/build/Task-Weaken-1.04

  CPAN.pm: Going to build A/AD/ADAMK/Task-Weaken-1.04.tar.gz

cp lib/Task/Weaken.pm blib/lib/Task/Weaken.pm
Manifying blib/man3/Task::Weaken.3pm
  /usr/bin/make -- OK
Running make test
PERL_DL_NONLAZY=1 /usr/bin/perl "-MExtUtils::Command::MM" "-e" "test_harness(0, 'inc', 'blib/lib', 'blib/arch')" t/*.t
All tests successful.
Files=2, Tests=21, 0 wallclock secs ( 0.03 cusr + 0.01 csys = 0.04 CPU)
  /usr/bin/make test -- OK
Running make install
Installing /usr/lib/perl5/site_perl/5.8.8/Task/Weaken.pm
Installing /usr/share/man/man3/Task::Weaken.3pm
Appending installation info to /usr/lib64/perl5/5.8.8/x86_64-linux-thread-multi/perllocal.pod
  /usr/bin/make install -- OK


range (administrator)

Same here.


clockworksoldier (reporter)

Sorry. My problem Seems to be related to a thrid party package. Very Sorry. ;-(

Comparing my workstation [fty] where Moose was previously fiddled with, with a pretty bare server [chewbag] - the cause becomes clear.

[fty ~]# cat tt.pl

    use Scalar::Util qw/weaken/;
      my $a;

        my $b = "some very big thing";
        $a = \$b;

        weaken($a); # Make $a a weak reference

    # $b has gone out of scope, since $a was a weak reference
    # $b can now be cleaned up and $a is set to undef

[fty ~]# perl ./tt.pl
weaken is only available with the XS version of Scalar::Util at ./tt.pl line 3
BEGIN failed--compilation aborted at ./tt.pl line 3.

[fty ~]# rpm -q perl-Task-Weaken --qf "%{name}-%{version}.%{release}.%{arch}\n"
[fty ~]# ### this is broken

[fty ~]# rpm -qi perl-Task-Weaken
Name : perl-Task-Weaken Relocations: (not relocatable)
Version : 1.03 Vendor: Dag Apt Repository, http://dag.wieers.com/apt/
Release : 1.el5.rf Build Date: Thu 18 Jun 2009 04:59:44 BST
Install Date: Fri 11 Feb 2011 16:48:42 GMT Build Host: lisse.hasselt.wieers.com
Group : Applications/CPAN Source RPM: perl-Task-Weaken-1.03-1.el5.rf.src.rpm
Size : 29721 License: Artistic/GPL
Signature : DSA/SHA1, Fri 19 Jun 2009 02:21:08 BST, Key ID a20e52146b8d79e6
Packager : Dag Wieers <dag@wieers.com>
URL : http://search.cpan.org/dist/Task-Weaken/
Summary : Ensure that a platform has weaken support
Description :
Ensure that a platform has weaken support.

After errant package is removed [fty] and a rollback to perl-5.8.8-32.el5_5.2.i386.rpm then a subsequent upgrade - fault remains.


[chewbag ~]# rpm -q perl-Task-Weaken --qf "%{name}-%{version}.%{release}.%{arch}\n"
package perl-Task-Weaken is not installed
[chewbag ~]# ### this box is OK

Sorry, but thanks for yout time (I will try to be less excited next time).

Please close this ticket, because it is not a bug as I had initially thought.


herrold (reporter)

close per reporter request, as mis-filed

-Issue History
Date Modified Username Field Change
2011-07-19 22:45 clockworksoldier New Issue
2011-07-19 22:45 clockworksoldier File Added: centos-5.6-perl-scalar_util_weaken-error-transcript.txt
2011-07-20 10:50 wolfy Note Added: 0013013
2011-07-20 10:56 range Note Added: 0013014
2011-07-20 12:49 clockworksoldier Note Added: 0013015
2011-07-20 14:25 herrold Note Added: 0013016
2011-07-20 14:25 herrold Status new => closed
2011-07-20 14:25 herrold Resolution open => no change required
+Issue History