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[perl #21742] eval 'require Foo::Bar' differs from require Foo::Bar
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From:
Michael G Schwern
Date:
March 28, 2003 21:40
Subject:
[perl #21742] eval 'require Foo::Bar' differs from require Foo::Bar
Message ID:
rt-21742-54246.18.1943742044218@bugs6.perl.org
# New Ticket Created by Michael G Schwern
# Please include the string: [perl #21742]
# in the subject line of all future correspondence about this issue.
# <URL: http://rt.perl.org/rt2/Ticket/Display.html?id=21742 >
This is a bug report for perl from schwern@pobox.com,
generated with the help of perlbug 1.34 running under perl v5.8.0.
-----------------------------------------------------------------
[Please enter your report here]
$ perl5.8.0 -e 'require Pod::Man; print $@'
$ perl5.8.0 -e 'eval q[require Pod::Man]; print $@'
Pod/Man.pm did not return a true value at (eval 1) line 3.
This problem occurs in at least 5.8.0 and bleadperl@18374. It is not
in 5.6.0.
Its pretty serious. eval q[require Foo::Bar] is the usual way to
check if one has a module installed and causes MakeMaker to incorrectly
assume a module is not installed. It only appears to be a problem if
the module does not have an explicit true value at the end.
Some discussion about the bug is in this thread:
http://archive.develooper.com/vmsperl@perl.org/msg06569.html
[Please do not change anything below this line]
-----------------------------------------------------------------
---
Flags:
category=core
severity=high
---
Site configuration information for perl v5.8.0:
Configured by schwern at Sat Feb 22 11:32:44 GMT 2003.
Summary of my perl5 (revision 5.0 version 8 subversion 0) configuration:
Platform:
osname=darwin, osvers=6.4, archname=darwin-64all
uname='darwin schwerns-computer.local. 6.4 darwin kernel version 6.4: wed jan 29 18:50:42 pst 2003; root:xnuxnu-344.26.obj~1release_ppc power macintosh powerpc '
config_args=''
hint=recommended, useposix=true, d_sigaction=define
usethreads=undef use5005threads=undef useithreads=undef usemultiplicity=undef
useperlio=define d_sfio=undef uselargefiles=define usesocks=undef
use64bitint=define use64bitall=undef uselongdouble=undef
usemymalloc=n, bincompat5005=undef
Compiler:
cc='cc', ccflags ='-pipe -fno-common -no-cpp-precomp -DDEBUGGING -fno-strict-aliasing',
optimize='-O3 -g',
cppflags='-no-cpp-precomp -pipe -fno-common -no-cpp-precomp -DDEBUGGING -fno-strict-aliasing'
ccversion='', gccversion='3.1 20020420 (prerelease)', gccosandvers=''
intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=87654321
d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=8
ivtype='long long', ivsize=8, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=8
alignbytes=8, prototype=define
Linker and Libraries:
ld='cc', ldflags ='-flat_namespace -L/sw/lib'
libpth=/sw/lib /usr/lib
libs=-lgdbm -ldb -lm -lc
perllibs=-lm -lc
libc=/usr/lib/libc.dylib, so=dylib, useshrplib=true, libperl=libperl.dylib
gnulibc_version=''
Dynamic Linking:
dlsrc=dl_dyld.xs, dlext=bundle, d_dlsymun=undef, ccdlflags=' '
cccdlflags=' ', lddlflags=' -flat_namespace -bundle -undefined suppress -L/sw/lib'
Locally applied patches:
---
@INC for perl v5.8.0:
/sw/lib/perl5
/usr/local/perl5.8.0/lib/darwin-64all
/usr/local/perl5.8.0/lib
/usr/local/perl5.8.0/lib/site_perl/darwin-64all
/usr/local/perl5.8.0/lib/site_perl
/usr/local/perl5.8.0/lib/site_perl
/usr/local/perl5.8.0/lib/vendor/darwin-64all
/usr/local/perl5.8.0/lib/vendor
/usr/local/perl5.8.0/lib/vendor
.
---
Environment for perl v5.8.0:
DYLD_LIBRARY_PATH (unset)
HOME=/Users/schwern
LANG=en_US
LANGUAGE=en
LC_ALL=C
LD_LIBRARY_PATH (unset)
LOGDIR (unset)
PATH=/Users/schwern/bin:/usr/local/bin:/sw/bin:/sw/sbin:/bin:/sbin:/usr/bin:/usr/sbin:/usr/X11R6/bin
PERL5LIB=/sw/lib/perl5
PERL_BADLANG (unset)
SHELL=/bin/bash
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[perl #21742] eval 'require Foo::Bar' differs from require Foo::Bar
by Michael G Schwern