| Subject: | Silently fails to load modules under specific weird circumstances |
In below example A2.pl fails to load module
===
$ cat BB.pm
package BB;
print "LOADED\n";
1;
$ cat A1.pl
use strict;
use warnings;
use Class::Load qw/load_class/;
load_class "BB";
$ perl A1.pl
LOADED
$ cat A2.pl
use strict;
use warnings;
use Class::Load qw/load_class/;
my $sub = \&BB::notasubroutine;
load_class "BB";
$ perl A2.pl
$ cat A3.pl
use strict;
use warnings;
use Class::Load qw/load_class/;
my $sub = \&BB::notasubroutine;
require BB;
$ perl A3.pl
LOADED
===
my env:
$ perl -MClass::Load -E 'say $Class::Load::VERSION'
0.23
$ perl -V
Summary of my perl5 (revision 5 version 14 subversion 2) configuration:
Platform:
osname=linux, osvers=2.6.42-37-generic, archname=x86_64-linux-gnu-thread-multi
uname='linux panlong 2.6.42-37-generic #58-ubuntu smp thu jan 24 15:28:10 utc 2013 x86_64 x86_64 x86_64 gnulinux '
config_args='-Dusethreads -Duselargefiles -Dccflags=-DDEBIAN -Dcccdlflags=-fPIC -Darchname=x86_64-linux-gnu -Dprefix=/usr -Dprivlib=/usr/share/perl/5.14 -Darchlib=/usr/lib/perl/5.14 -Dvendorprefix=/usr -Dvendorlib=/usr/share/perl5 -Dvendorarch=/usr/lib/perl5 -Dsiteprefix=/usr/local -Dsitelib=/usr/local/share/perl/5.14.2 -Dsitearch=/usr/local/lib/perl/5.14.2 -Dman1dir=/usr/share/man/man1 -Dman3dir=/usr/share/man/man3 -Dsiteman1dir=/usr/local/man/man1 -Dsiteman3dir=/usr/local/man/man3 -Duse64bitint -Dman1ext=1 -Dman3ext=3perl -Dpager=/usr/bin/sensible-pager -Uafs -Ud_csh -Ud_ualarm -Uusesfio -Uusenm -Ui_libutil -DDEBUGGING=-g -Doptimize=-O2 -Duseshrplib -Dlibperl=libperl.so.5.14.2 -des'
hint=recommended, useposix=true, d_sigaction=define
useithreads=define, usemultiplicity=define
useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=undef
use64bitint=define, use64bitall=define, uselongdouble=undef
usemymalloc=n, bincompat5005=undef
Compiler:
cc='cc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -DDEBIAN -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
optimize='-O2 -g',
cppflags='-D_REENTRANT -D_GNU_SOURCE -DDEBIAN -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include'
ccversion='', gccversion='4.6.3', 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/x86_64-linux-gnu /lib/../lib /usr/lib/x86_64-linux-gnu /usr/lib/../lib /lib /usr/lib
libs=-lgdbm -lgdbm_compat -ldb -ldl -lm -lpthread -lc -lcrypt
perllibs=-ldl -lm -lpthread -lc -lcrypt
libc=, so=so, useshrplib=true, libperl=libperl.so.5.14.2
gnulibc_version='2.15'
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E'
cccdlflags='-fPIC', lddlflags='-shared -O2 -g -L/usr/local/lib -fstack-protector'
Characteristics of this binary (from libperl):
Compile-time options: MULTIPLICITY PERL_DONT_CREATE_GVSV
PERL_IMPLICIT_CONTEXT PERL_MALLOC_WRAP
PERL_PRESERVE_IVUV USE_64_BIT_ALL USE_64_BIT_INT
USE_ITHREADS USE_LARGE_FILES USE_PERLIO USE_PERL_ATOF
USE_REENTRANT_API
Locally applied patches:
DEBPKG:debian/arm_thread_stress_timeout - http://bugs.debian.org/501970 Raise the timeout of ext/threads/shared/t/stress.t to accommodate slower build hosts
DEBPKG:debian/cpan_definstalldirs - Provide a sensible INSTALLDIRS default for modules installed from CPAN.
DEBPKG:debian/db_file_ver - http://bugs.debian.org/340047 Remove overly restrictive DB_File version check.
DEBPKG:debian/doc_info - Replace generic man(1) instructions with Debian-specific information.
DEBPKG:debian/enc2xs_inc - http://bugs.debian.org/290336 Tweak enc2xs to follow symlinks and ignore missing @INC directories.
DEBPKG:debian/errno_ver - http://bugs.debian.org/343351 Remove Errno version check due to upgrade problems with long-running processes.
DEBPKG:debian/libperl_embed_doc - http://bugs.debian.org/186778 Note that libperl-dev package is required for embedded linking
DEBPKG:fixes/respect_umask - Respect umask during installation
DEBPKG:debian/writable_site_dirs - Set umask approproately for site install directories
DEBPKG:debian/extutils_set_libperl_path - EU:MM: Set location of libperl.a to /usr/lib
DEBPKG:debian/no_packlist_perllocal - Don't install .packlist or perllocal.pod for perl or vendor
DEBPKG:debian/prefix_changes - Fiddle with *PREFIX and variables written to the makefile
DEBPKG:debian/fakeroot - Postpone LD_LIBRARY_PATH evaluation to the binary targets.
DEBPKG:debian/instmodsh_doc - Debian policy doesn't install .packlist files for core or vendor.
DEBPKG:debian/ld_run_path - Remove standard libs from LD_RUN_PATH as per Debian policy.
DEBPKG:debian/libnet_config_path - Set location of libnet.cfg to /etc/perl/Net as /usr may not be writable.
DEBPKG:debian/m68k_thread_stress - http://bugs.debian.org/517938 http://bugs.debian.org/495826 Disable some threads tests on m68k for now due to missing TLS.
DEBPKG:debian/mod_paths - Tweak @INC ordering for Debian
DEBPKG:debian/module_build_man_extensions - http://bugs.debian.org/479460 Adjust Module::Build manual page extensions for the Debian Perl policy
DEBPKG:debian/prune_libs - http://bugs.debian.org/128355 Prune the list of libraries wanted to what we actually need.
DEBPKG:fixes/net_smtp_docs - [rt.cpan.org #36038] http://bugs.debian.org/100195 Document the Net::SMTP 'Port' option
DEBPKG:debian/perlivp - http://bugs.debian.org/510895 Make perlivp skip include directories in /usr/local
DEBPKG:debian/disable-zlib-bundling - Disable zlib bundling in Compress::Raw::Zlib
DEBPKG:debian/cpanplus_definstalldirs - http://bugs.debian.org/533707 Configure CPANPLUS to use the site directories by default.
DEBPKG:debian/cpanplus_config_path - Save local versions of CPANPLUS::Config::System into /etc/perl.
DEBPKG:debian/deprecate-with-apt - http://bugs.debian.org/580034 Point users to Debian packages of deprecated core modules
DEBPKG:fixes/hurd-ccflags - [a190e64] http://bugs.debian.org/587901 [perl #92244] Make hints/gnu.sh append to $ccflags rather than overriding them
DEBPKG:debian/squelch-locale-warnings - http://bugs.debian.org/508764 Squelch locale warnings in Debian package maintainer scripts
DEBPKG:debian/skip-upstream-git-tests - Skip tests specific to the upstream Git repository
DEBPKG:fixes/extutils-cbuilder-cflags - [011e8fb] http://bugs.debian.org/624460 [perl #89478] Append CFLAGS and LDFLAGS to their Config.pm counterparts in EU::CBuilder
DEBPKG:fixes/module-build-home-directory - http://bugs.debian.org/624850 [rt.cpan.org #67893] Fix failing tilde test when run under a UID without a passwd entry
DEBPKG:debian/patchlevel - http://bugs.debian.org/567489 List packaged patches for 5.14.2-6ubuntu2.4 in patchlevel.h
DEBPKG:fixes/h2ph-multiarch - [e7ec705] http://bugs.debian.org/625808 [perl #90122] Make h2ph correctly search gcc include directories
DEBPKG:fixes/index-tainting - [3b36395] http://bugs.debian.org/291450 [perl #64804] RT 64804: tainting with index() of a constant
DEBPKG:debian/skip-kfreebsd-crash - http://bugs.debian.org/628493 [perl #96272] Skip a crashing test case in t/op/threads.t on GNU/kFreeBSD
DEBPKG:fixes/document_makemaker_ccflags - http://bugs.debian.org/628522 [rt.cpan.org #68613] Document that CCFLAGS should include $Config{ccflags}
DEBPKG:fixes/sys-syslog-socket-timeout-kfreebsd.patch - http://bugs.debian.org/627821 [rt.cpan.org #69997] Use a socket timeout on GNU/kFreeBSD to catch ICMP port unreachable messages
DEBPKG:fixes/hurd-hints - http://bugs.debian.org/636609 Improve general GNU hints, needed for GNU/Hurd.
DEBPKG:fixes/pod_fixes - [7698aed] http://bugs.debian.org/637816 Fix typos in several pod/perl*.pod files
DEBPKG:debian/find_html2text - http://bugs.debian.org/640479 Configure CPAN::Distribution with correct name of html2text
DEBPKG:fixes/digest_eval_hole - http://bugs.debian.org/644108 Close the eval "require $module" security hole in Digest->new($algorithm)
DEBPKG:fixes/hurd-ndbm - [f0d0a20] [perl #102680] http://bugs.debian.org/645989 Add GNU/Hurd hints for NDBM_File
DEBPKG:fixes/sysconf.t-posix - [8040185] [perl #102888] http://bugs.debian.org/646016 Fix hang in ext/POSIX/t/sysconf.t on GNU/Hurd
DEBPKG:fixes/hurd-largefile - [1fda587] [perl #103014] http://bugs.debian.org/645790 enable LFS on GNU/Hurd
DEBPKG:debian/hurd_test_todo_syslog - http://bugs.debian.org/650093 Disable failing GNU/Hurd tests in cpan/Sys-Syslog/t/syslog.t
DEBPKG:fixes/hurd_skip_itimer_virtual - [rt.cpan.org #72754] http://bugs.debian.org/650094 Skip interval timer tests in Time::HiRes on GNU/Hurd
DEBPKG:debian/hurd_test_skip_socketpair - http://bugs.debian.org/650186 Disable failing GNU/Hurd tests ext/Socket/t/socketpair.t
DEBPKG:debian/hurd_test_skip_sigdispatch - http://bugs.debian.org/650188 Disable failing GNU/Hurd tests op/sigdispatch.t
DEBPKG:debian/hurd_test_skip_stack - http://bugs.debian.org/650175 Disable failing GNU/Hurd tests dist/threads/t/stack.t
DEBPKG:debian/hurd_test_skip_recv - http://bugs.debian.org/650095 Disable failing GNU/Hurd tests cpan/autodie/t/recv.t
DEBPKG:debian/hurd_test_skip_libc - http://bugs.debian.org/650097 Disable failing GNU/Hurd tests dist/threads/t/libc.t
DEBPKG:debian/hurd_test_skip_pipe - http://bugs.debian.org/650187 Disable failing GNU/Hurd tests io/pipe.t
DEBPKG:debian/hurd_test_skip_io_pipe - http://bugs.debian.org/650096 Disable failing GNU/Hurd tests dist/IO/t/io_pipe.t
DEBPKG:fixes/CVE-2012-5195 - avoid calling memset with a negative count
DEBPKG:fixes/CVE-2012-5526 - [PATCH 1/4] CR escaping for P3P header
DEBPKG:CVE-2013-1667.patch - [PATCH] Prevent premature hsplit() calls, and only trigger REHASH after hsplit()
DEBPKG:CVE-2012-6329.patch - http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=695224 [1735f6f] fix arbitrary command execution via _compile function in Maketext.pm
Built under linux
Compiled at Feb 4 2014 23:11:19
%ENV:
PERLBREW_BASHRC_VERSION="0.69"
PERLBREW_HOME="/home/vse/.perlbrew"
PERLBREW_MANPATH=""
PERLBREW_PATH="/home/perlbrew/bin"
PERLBREW_ROOT="/home/perlbrew"
PERLBREW_VERSION="0.67"
@INC:
/etc/perl
/usr/local/lib/perl/5.14.2
/usr/local/share/perl/5.14.2
/usr/lib/perl5
/usr/share/perl5
/usr/lib/perl/5.14
/usr/share/perl/5.14
/usr/local/lib/site_perl
.