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[perl #56954] Valid syntax provided by @INC import hook is misparsed

From:
Dean Herington
Date:
July 16, 2008 05:19
Subject:
[perl #56954] Valid syntax provided by @INC import hook is misparsed
Message ID:
rt-3.6.HEAD-8814-1216137081-1057.56954-75-0@perl.org
# New Ticket Created by  Dean Herington 
# Please include the string:  [perl #56954]
# in the subject line of all future correspondence about this issue. 
# <URL: http://rt.perl.org/rt3/Ticket/Display.html?id=56954 >


This is a bug report for perl from herington_dean@emc.com,

generated with the help of perlbug 1.35 running under perl v5.8.5.

 

The attached program uses an @INC import hook to make two simple

modules available from text in the program itself.

`require Mod2` fails with:

 

    Missing right curly or square bracket at /loader/0x94ffc20/Mod2.pm
line 7, at end of line

    syntax error at /loader/0x94ffc20/Mod2.pm line 7, at EOF

    Compilation failed in require at INC-sub-bug line 47.

 

even though module Mod2 is well-formed Perl code.  Note that

`require Mod1` succeeds, even though there is only a slight syntactic

difference between the two modules.

 

 

#!/usr/bin/perl -w

 

use strict;

 

sub lines_array { [$_[0] =~ /(.*\n)/g] }

 

my %files;

 

$files{"Mod1.pm"} = lines_array <<'END';

package Mod1;

sub subr {

    my ($path) = @_;

    open FH1, "<", $path

                         or die;

}

1;

END

 

$files{"Mod2.pm"} = lines_array <<'END';

package Mod2;

sub subr {

    my ($path) = @_;

    open FH2, "<", $path

        or die;

}

1;

END

 

unshift @INC, sub {

    my ($self, $path) = @_;

    my $content = $files{$path};

    if ($content) {

        my $next = 0;

        sub {

            if ($next < @$content) {

                $_ = $content->[$next];

                $next++;

                1;

            } else {

                0;

            }

        };

    }

};

 

require Mod1;

require Mod2;

---

Flags:

    category=core

    severity=high

---

This perlbug was built using Perl v5.8.5 in the Red Hat build system.

It is being executed now by Perl v5.8.5 - Mon Jul 24 18:27:33 EDT 2006.

 

Site configuration information for perl v5.8.5:

 

Configured by Red Hat, Inc. at Mon Jul 24 18:27:33 EDT 2006.

 

Summary of my perl5 (revision 5 version 8 subversion 5) configuration:

  Platform:

    osname=linux, osvers=2.6.9-22.18.bz155725.elsmp,
archname=i386-linux-thread-multi

    uname='linux hs20-bc1-4.build.redhat.com 2.6.9-22.18.bz155725.elsmp
#1 smp thu nov 17 15:34:08 est 2005 i686 i686 i386 gnulinux '

    config_args='-des -Doptimize=-O2 -g -pipe -m32 -march=i386
-mtune=pentium4 -Dversion=5.8.5 -Dmyhostname=localhost
-Dperladmin=root@localhost -Dcc=gc\

c -Dcf_by=Red Hat, Inc. -Dinstallprefix=/usr -Dprefix=/usr
-Darchname=i386-linux -Dvendorprefix=/usr -Dsiteprefix=/usr -Duseshrplib
-Dusethreads -Duseit\

hreads -Duselargefiles -Dd_dosuid -Dd_semctl_semun -Di_db -Ui_ndbm
-Di_gdbm -Di_shadow -Di_syslog -Dman3ext=3pm -Duseperlio
-Dinstallusrbinperl -Ubincom\

pat5005 -Uversiononly -Dpager=/usr/bin/less -isr
-Dinc_version_list=5.8.4 5.8.3 5.8.2 5.8.1 5.8.0'

    hint=recommended, useposix=true, d_sigaction=define

    usethreads=define use5005threads=undef useithreads=define
usemultiplicity=define

    useperlio=define d_sfio=undef uselargefiles=define usesocks=undef

    use64bitint=undef use64bitall=undef uselongdouble=undef

    usemymalloc=n, bincompat5005=undef

  Compiler:

    cc='gcc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -DDEBUGGING
-fno-strict-aliasing -pipe -I/usr/local/include -D_LARGEFILE_SOURCE
-D_FILE_OFFSET_BITS=6\

4 -I/usr/include/gdbm',

    optimize='-O2 -g -pipe -m32 -march=i386 -mtune=pentium4',

    cppflags='-D_REENTRANT -D_GNU_SOURCE -DDEBUGGING
-fno-strict-aliasing -pipe -I/usr/local/include -I/usr/include/gdbm'

    ccversion='', gccversion='3.4.6 20060404 (Red Hat 3.4.6-2)',
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='gcc', ldflags =' -L/usr/local/lib'

    libpth=/usr/local/lib /lib /usr/lib

    libs=-lresolv -lnsl -lgdbm -ldb -ldl -lm -lcrypt -lutil -lpthread
-lc

    perllibs=-lresolv -lnsl -ldl -lm -lcrypt -lutil -lpthread -lc

    libc=/lib/libc-2.3.4.so, so=so, useshrplib=true, libperl=libperl.so

    gnulibc_version='2.3.4'

  Dynamic Linking:

    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E
-Wl,-rpath,/usr/lib/perl5/5.8.5/i386-linux-thread-multi/CORE'

    cccdlflags='-fPIC', lddlflags='-shared -L/usr/local/lib'

 

Locally applied patches:

 

 

---

@INC for perl v5.8.5:

    /usr/lib/perl5/5.8.5/i386-linux-thread-multi

    /usr/lib/perl5/5.8.5

    /usr/lib/perl5/site_perl/5.8.5/i386-linux-thread-multi

    /usr/lib/perl5/site_perl/5.8.4/i386-linux-thread-multi

    /usr/lib/perl5/site_perl/5.8.3/i386-linux-thread-multi

    /usr/lib/perl5/site_perl/5.8.2/i386-linux-thread-multi

    /usr/lib/perl5/site_perl/5.8.1/i386-linux-thread-multi

    /usr/lib/perl5/site_perl/5.8.0/i386-linux-thread-multi

    /usr/lib/perl5/site_perl/5.8.5

    /usr/lib/perl5/site_perl/5.8.4

    /usr/lib/perl5/site_perl/5.8.3

    /usr/lib/perl5/site_perl/5.8.2

    /usr/lib/perl5/site_perl/5.8.1

    /usr/lib/perl5/site_perl/5.8.0

    /usr/lib/perl5/site_perl

    /usr/lib/perl5/vendor_perl/5.8.5/i386-linux-thread-multi

    /usr/lib/perl5/vendor_perl/5.8.4/i386-linux-thread-multi

    /usr/lib/perl5/vendor_perl/5.8.3/i386-linux-thread-multi

    /usr/lib/perl5/vendor_perl/5.8.2/i386-linux-thread-multi

    /usr/lib/perl5/vendor_perl/5.8.1/i386-linux-thread-multi

    /usr/lib/perl5/vendor_perl/5.8.0/i386-linux-thread-multi

    /usr/lib/perl5/vendor_perl/5.8.5

    /usr/lib/perl5/vendor_perl/5.8.4

    /usr/lib/perl5/vendor_perl/5.8.3

    /usr/lib/perl5/vendor_perl/5.8.2

    /usr/lib/perl5/vendor_perl/5.8.1

    /usr/lib/perl5/vendor_perl/5.8.0

    /usr/lib/perl5/vendor_perl

    .

 

---

Environment for perl v5.8.5:

    HOME=/emc/herind

    LANG=en_US.UTF-8

    LANGUAGE (unset)

    LD_LIBRARY_PATH (unset)

    LOGDIR (unset)

 
PATH=/pdd/cvs/bin.rh7.ix86:/pdd/cvs/bin:.:/emc/herind/bin:/emc/herind/ap
p/bin:/disks/NSG_Root/CS_tools:/usr/kerberos/bin:/usr/local/bin:/bin:/us
r/bi\

n:/usr/X11R6/bin

    PERL_BADLANG (unset)

    SHELL=/bin/csh




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