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Piers Lauder
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Piers Lauder.
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Subject: [perl #22615] Strange assignment failure in (??{}) regex
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# New Ticket Created by perl-...@ton.iguana.be
# Please include the string: [perl #22615]
# in the subject line of all future correspondence about this issue.
# <URL: http://rt.perl.org/rt2/Ticket/Display.html?id=22615 >
This is a bug report for perl from perl-...@ton.iguana.be,
generated with the help of perlbug 1.34 running under perl v5.8.0.
-----------------------------------------------------------------
[Please enter your report here]
perl -le 'print "lay1"=~/l.y.?(??{$+[0]==4?0:1})/ ? "yes" : "no"'
yes
perl -le 'print "lay1"=~/l.y.?(??{$a=$+[0]==4?0:1})/ ? "yes" : "no"'
no
Theres is no reason these should differ
[Please do not change anything below this line]
-----------------------------------------------------------------
---
Flags:
category=core
severity=low
---
Site configuration information for perl v5.8.0:
Configured by ton at Tue Nov 12 01:56:18 CET 2002.
Summary of my perl5 (revision 5.0 version 8 subversion 0) configuration:
Platform:
osname=linux, osvers=2.4.19, archname=i686-linux-thread-multi-64int-ld
uname='linux quasar 2.4.19 #5 wed oct 2 02:34:25 cest 2002 i686 unknown '
config_args=''
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=define use64bitall=undef uselongdouble=define
usemymalloc=y, bincompat5005=undef
Compiler:
cc='cc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
optimize='-O2 -fomit-frame-pointer',
cppflags='-D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing -I/usr/local/include'
ccversion='', gccversion='2.95.3 20010315 (release)', gccosandvers=''
intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=12345678
d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12
ivtype='long long', ivsize=8, nvtype='long double', nvsize=12, Off_t='off_t', lseeksize=8
alignbytes=4, prototype=define
Linker and Libraries:
ld='cc', ldflags =' -L/usr/local/lib'
libpth=/usr/local/lib /lib /usr/lib
libs=-lnsl -lndbm -ldb -ldl -lm -lpthread -lc -lposix -lcrypt -lutil
perllibs=-lnsl -ldl -lm -lpthread -lc -lposix -lcrypt -lutil
libc=/lib/libc-2.2.4.so, so=so, useshrplib=false, libperl=libperl.a
gnulibc_version='2.2.4'
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 v5.8.0:
/usr/lib/perl5/5.8.0/i686-linux-thread-multi-64int-ld
/usr/lib/perl5/5.8.0
/usr/lib/perl5/site_perl/5.8.0/i686-linux-thread-multi-64int-ld
/usr/lib/perl5/site_perl/5.8.0
/usr/lib/perl5/site_perl
.
---
Environment for perl v5.8.0:
HOME=/home/ton
LANG (unset)
LANGUAGE (unset)
LD_LIBRARY_PATH (unset)
LOGDIR (unset)
PATH=/home/ton/bin.Linux:/home/ton/bin:/home/ton/bin.SampleSetup:/usr/local/bin:/usr/local/sbin:/usr/local/jre/bin:/home/oracle/product/9.0.1/bin:/usr/local/ar/bin:/usr/games/bin:/usr/X11R6/bin:/usr/share/bin:/usr/bin:/usr/sbin:/bin:/sbin:.
PERL_BADLANG (unset)
SHELL=/bin/bash
Piers Lauder
Your have sent me a message from an address marked as being primarily
a source of SPAM (also known as "unsolicited commercial e-mail"),
and the message has been discarded.
If in fact this was a genuine non-SPAM message and you still wish
to contact me, then you need to re-send the message from a different
address. And please accept my apologies for the inconvenience.
Piers Lauder.
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Subject: [perl #22614] Spurious undefs in @- and @+ during (?{}) and (??{}) regexes
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# New Ticket Created by perl-...@ton.iguana.be
# Please include the string: [perl #22614]
# in the subject line of all future correspondence about this issue.
# <URL: http://rt.perl.org/rt2/Ticket/Display.html?id=22614 >
This is a bug report for perl from perl-...@ton.iguana.be,
generated with the help of perlbug 1.34 running under perl v5.8.0.
-----------------------------------------------------------------
[Please enter your report here]
perl -MData::Dumper -wle '$_="ab"; /(.){1,}(?{print Dumper(\@-)})(.){1,}(?{})^/'
$VAR1 = [
'0',
'1'
];
$VAR1 = [
'0',
'0',
undef
];
$VAR1 = [
'1',
'1'
];
What's that undef doing there ?
If I drop the useless () at the end things work as expected:
perl -MData::Dumper -wle '$_="ab"; /(.){1,}(?{print Dumper(\@-)}).{1,}^/'
$VAR1 = [
'0',
'1'
];
$VAR1 = [
'0',
'0'
];
$VAR1 = [
'1',
'1'
];
It looks like the array length of @- and @+ is not
properly localized during backtracking