[perl #21411] Postponed RE with split()

# New Ticket Created by  Philippe 'BooK' Bruhat 
# Please include the string:  [perl #21411]
# in the subject line of all future correspondence about this issue. 
# <URL: http://rt.perl.org/rt2/Ticket/Display.html?id=21411 >



This is a bug report for perl from book@cpan.org,
generated with the help of perlbug 1.33 running under perl v5.6.1.


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[Please enter your report here]

I wanted to try the experimental (??{ }) regexp construct in a split:

#!/usr/bin/perl
#use re 'debug';
my $i; sub n { ++$i }
my $c = 'a';
my $s = join '', map { $c++ x $_ } 1 .. shift;
print join "|", split /((??{"."x n()}))/, $s;

$ perl split_with_postponed_re 1
|a

$ perl split_with_postponed_re 2
|a||bb

$ perl split_with_postponed_re 3
|a||...||ccc
Expected: |a||bb||ccc

$ perl split_with_postponed_re 4
|a||....|4|ccc||dddd
Expected: |a||bb||ccc||dddd

$ perl split_with_postponed_re 5
|a||.....|5|ccc||dddd||eeeee
Expected: |a||bb||ccc||dddd||eeeee

Commenting out the use re 'debug' line gives a rather long output, but
it looks quite normal.

Tested with perl5.8.0, perl5.6.1 and bleadperl, with the same results.

[Please do not change anything below this line]
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---
Flags:
    category=core
    severity=low
---
Site configuration information for perl v5.6.1:

Configured by buildd at Sat Nov 30 17:45:17 UTC 2002.

Summary of my perl5 (revision 5.0 version 6 subversion 1) configuration:
  Platform:
    osname=linux, osvers=2.4.19, archname=i386-linux
    uname='linux cyberhq 2.4.19 #1 smp sun aug 4 11:30:45 pdt 2002 i686 unknown '
    config_args='-Dccflags=-DDEBIAN -Dcccdlflags=-fPIC -Darchname=i386-linux -Dprefix=/usr -Dprivlib=/usr/share/perl/5.6.1 -Darchlib=/usr/lib/perl/5.6.1 -Dvendorprefix=/usr -Dvendorlib=/usr/share/perl5 -Dvendorarch=/usr/lib/perl5 -Dsiteprefix=/usr/local -Dsitelib=/usr/local/share/perl/5.6.1 -Dsitearch=/usr/local/lib/perl/5.6.1 -Dman1dir=/usr/share/man/man1 -Dman3dir=/usr/share/man/man3 -Dman1ext=1 -Dman3ext=3perl -Dpager=/usr/bin/sensible-pager -Uafs -Ud_csh -Uusesfio -Duseshrplib -Dlibperl=libperl.so.5.6.1 -Dd_dosuid -des'
    hint=recommended, useposix=true, d_sigaction=define
    usethreads=undef use5005threads=undef useithreads=undef usemultiplicity=undef
    useperlio=undef d_sfio=undef uselargefiles=define usesocks=undef
    use64bitint=undef use64bitall=undef uselongdouble=undef
  Compiler:
    cc='cc', ccflags ='-DDEBIAN -fno-strict-aliasing -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
    optimize='-O2',
    cppflags='-DDEBIAN -fno-strict-aliasing -I/usr/local/include'
    ccversion='', gccversion='2.95.4 20011002 (Debian prerelease)', 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, usemymalloc=n, prototype=define
  Linker and Libraries:
    ld='cc', ldflags =' -L/usr/local/lib'
    libpth=/usr/local/lib /lib /usr/lib
    libs=-lgdbm -ldb -ldl -lm -lc -lcrypt
    perllibs=-ldl -lm -lc -lcrypt
    libc=/lib/libc-2.2.5.so, so=so, useshrplib=true, libperl=libperl.so.5.6.1
  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 v5.6.1:
    /home/book/sources/perl
    /home/book/bin/perl
    /usr/local/lib/perl/5.6.1
    /usr/local/share/perl/5.6.1
    /usr/lib/perl5
    /usr/share/perl5
    /usr/lib/perl/5.6.1
    /usr/share/perl/5.6.1
    /usr/local/lib/site_perl
    .

---
Environment for perl v5.6.1:
    HOME=/home/book
    LANG=fr_FR@euro
    LANGUAGE (unset)
    LC_ALL=french
    LD_LIBRARY_PATH (unset)
    LOGDIR (unset)
    PATH=/home/book/bin:/usr/local/bin:/usr/bin:/bin:/usr/bin/X11:/usr/games:/usr/games:/usr/local/games:/usr/local/lib/jdk/bin:.
    PERL5LIB=/home/book/sources/perl:/home/book/bin/perl
    PERL_BADLANG (unset)
    SHELL=/bin/bash

• [perl #21411] Postponed RE with split() by perlbug-followup
• Re: [perl #21411] [fix] Postponed RE with split() by Enache Adrian
• Re: [perl #21411] [fix] Postponed RE with split() by hv
• Re: [perl #21411] [slippery] Postponed RE with split() by Enache Adrian
• Re: [perl #21411] [slippery] Postponed RE with split() by Enache Adrian