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[perl #68564] /g failure with zero-width patterns
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From:
Eric Brine
Date:
August 16, 2009 01:59
Subject:
[perl #68564] /g failure with zero-width patterns
Message ID:
rt-3.6.HEAD-2466-1250410558-1101.68564-75-0@perl.org
# New Ticket Created by "Eric Brine"
# Please include the string: [perl #68564]
# in the subject line of all future correspondence about this issue.
# <URL: http://rt.perl.org/rt3/Ticket/Display.html?id=68564 >
This is a bug report for perl from ikegami@adaelis.com,
generated with the help of perlbug 1.36 running under perl 5.10.0.
-----------------------------------------------------------------
[Please enter your report here]
A regression was introduced into 5.10.0 concerning /g and zero-width
patterns. The demo speaks for itself:
>c:\progs\perl589\bin\perl -wle"print for 'abc ' =~ /(?=(\S+))/g"
abc
bc
c
>c:\progs\perl5100\bin\perl -wle"print for 'abc ' =~ /(?=(\S+))/g"
abc
I expect the 5.8 behaviour. 5.6.x and 5.8.x behave like 5.8.9. I've been
told 5.10.1-RC1 behaves like 5.10.0. I don't know about blead.
Eric "ikegami" Brine
[Please do not change anything below this line]
-----------------------------------------------------------------
---
Flags:
category=core
severity=low
---
Site configuration information for perl 5.10.0:
Configured by SYSTEM at Wed Sep 3 13:16:08 2008.
Summary of my perl5 (revision 5 version 10 subversion 0) configuration:
Platform:
osname=MSWin32, osvers=5.00, archname=MSWin32-x86-multi-thread
uname=''
config_args='undef'
hint=recommended, useposix=true, d_sigaction=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='cl', ccflags ='-nologo -GF -W3 -MD -Zi -DNDEBUG -O1 -DWIN32
-D_CONSOLE -DNO_STRICT -DHAVE_DES_FCRYPT -DUSE_SITECUSTOMIZE
-DPRIVLIB_LAST_IN_INC -DPERL_IMPLICIT_CONTEXT -DPERL_IMPLICIT_SYS
-DUSE_PERLIO -DPERL_MSVCRT_READFIX',
optimize='-MD -Zi -DNDEBUG -O1',
cppflags='-DWIN32'
ccversion='12.00.8804', gccversion='', gccosandvers=''
intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=1234
d_longlong=undef, longlongsize=8, d_longdbl=define, longdblsize=10
ivtype='long', ivsize=4, nvtype='double', nvsize=8, Off_t='__int64',
lseeksize=8
alignbytes=8, prototype=define
Linker and Libraries:
ld='link', ldflags ='-nologo -nodefaultlib -debug -opt:ref,icf
-libpath:"C:\progs\perl5100\lib\CORE" -machine:x86'
libpth=\lib
libs= oldnames.lib kernel32.lib user32.lib gdi32.lib winspool.lib
comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib netapi32.lib
uuid.lib ws2_32.lib mpr.lib winmm.lib version.lib odbc32.lib odbccp32.lib
msvcrt.lib
perllibs= oldnames.lib kernel32.lib user32.lib gdi32.lib winspool.lib
comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib netapi32.lib
uuid.lib ws2_32.lib mpr.lib winmm.lib version.lib odbc32.lib odbccp32.lib
msvcrt.lib
libc=msvcrt.lib, so=dll, useshrplib=true, libperl=perl510.lib
gnulibc_version=''
Dynamic Linking:
dlsrc=dl_win32.xs, dlext=dll, d_dlsymun=undef, ccdlflags=' '
cccdlflags=' ', lddlflags='-dll -nologo -nodefaultlib -debug
-opt:ref,icf -libpath:"C:\progs\perl5100\lib\CORE" -machine:x86'
Locally applied patches:
ACTIVEPERL_LOCAL_PATCHES_ENTRY
33741 avoids segfaults invoking S_raise_signal() (on Linux)
33763 Win32 process ids can have more than 16 bits
32809 Load 'loadable object' with non-default file extension
32728 64-bit fix for Time::Local
---
@INC for perl 5.10.0:
c:/progs/perl5100/site/lib
c:/progs/perl5100/lib
.
---
Environment for perl 5.10.0:
HOME (unset)
LANG (unset)
LANGUAGE (unset)
LD_LIBRARY_PATH (unset)
LOGDIR (unset)
PATH=c:\bin;c:\progs\perl5100\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\WBEM
PERL_BADLANG (unset)
SHELL (unset)
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[perl #68564] /g failure with zero-width patterns
by Eric Brine