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[perl #107262] Unmatched \Q \E in regexp should warn
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From:
Ed Avis
Date:
December 29, 2011 02:49
Subject:
[perl #107262] Unmatched \Q \E in regexp should warn
Message ID:
rt-3.6.HEAD-14510-1325155725-687.107262-75-0@perl.org
# New Ticket Created by "Ed Avis"
# Please include the string: [perl #107262]
# in the subject line of all future correspondence about this issue.
# <URL: https://rt.perl.org:443/rt3/Ticket/Display.html?id=107262 >
This is a bug report for perl from eda@waniasset.com,
generated with the help of perlbug 1.39 running under perl 5.12.4.
-----------------------------------------------------------------
[Please describe your issue here]
I expected a warning from these because \Q and \E are not matched:
% perl -wE '$_ = "a"; /\Qa/ or die'
% perl -wE '$_ = "a"; /a\E/ or die'
I suggest that at the end of the regexp, if a \Q is still open then
warn.
If \E is found but there was no active \Q \l \u \L \U then warn.
Maybe there shouldn't be a warning for unclosed \l and so on, since
that is not a quoting mechanism in the same way as \Q...\E.
[Please do not change anything below this line]
-----------------------------------------------------------------
---
Flags:
category=core
severity=low
---
This perlbug was built using Perl 5.12.4 in the Fedora build system.
It is being executed now by Perl 5.12.4 - Fri Nov 4 15:25:14 UTC 2011.
Site configuration information for perl 5.12.4:
Configured by Red Hat, Inc. at Fri Nov 4 15:25:14 UTC 2011.
Summary of my perl5 (revision 5 version 12 subversion 4) configuration:
Platform:
osname=linux, osvers=2.6.32-131.2.1.el6.x86_64,
archname=x86_64-linux-thread-multi
uname='linux x86-05.phx2.fedoraproject.org 2.6.32-131.2.1.el6.x86_64
#1 smp wed may 18 07:07:37 edt 2011 x86_64 x86_64 x86_64 gnulinux '
config_args='-des -Doptimize=-O2 -g -pipe -Wall
-Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector
--param=ssp-buffer-size=4 -m64 -mtune=generic
-Dccdlflags=-Wl,--enable-new-d\
tags -DDEBUGGING=-g -Dversion=5.12.4 -Dmyhostname=localhost
-Dperladmin=root@localhost -Dcc=gcc -Dcf_by=Red Hat, Inc. -Dprefix=/usr
-Dvendorprefix=/usr -Dsiteprefix=/usr/local -Dsitel\
ib=/usr/local/share/perl5 -Dsitearch=/usr/local/lib64/perl5
-Dprivlib=/usr/share/perl5 -Dvendorlib=/usr/share/perl5/vendor_perl
-Darchlib=/usr/lib64/perl5 -Dvendorarch=/usr/lib64/perl\
5/vendor_perl -Darchname=x86_64-linux-thread-multi
-Dlibpth=/usr/local/lib64 /lib64 /usr/lib64 -Duseshrplib -Dusethreads
-Duseithreads -Dusedtrace=/usr/bin/dtrace -Duselargefiles -Dd_\
semctl_semun -Di_db -Ui_ndbm -Di_gdbm -Di_shadow -Di_syslog
-Dman3ext=3pm -Duseperlio -Dinstallusrbinperl=n -Ubincompat5005
-Uversiononly -Dpager=/usr/bin/less -isr -Dd_gethostent_r_p\
roto -Ud_endhostent_r_proto -Ud_sethostent_r_proto
-Ud_endprotoent_r_proto -Ud_setprotoent_r_proto -Ud_endservent_r_proto
-Ud_setservent_r_proto -Dscriptdir=/usr/bin'
hint=recommended, useposix=true, d_sigaction=define
useithreads=define, usemultiplicity=define
useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=undef
use64bitint=define, use64bitall=define, uselongdouble=undef
usemymalloc=n, bincompat5005=undef
Compiler:
cc='gcc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing
-pipe -fstack-protector -I/usr/local/include -D_LARGEFILE_SOURCE
-D_FILE_OFFSET_BITS=64',
optimize='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions
-fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic',
cppflags='-D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing -pipe
-fstack-protector -I/usr/local/include'
ccversion='', gccversion='4.6.1 20110908 (Red Hat 4.6.1-9)',
gccosandvers=''
intsize=4, longsize=8, ptrsize=8, doublesize=8, byteorder=12345678
d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=16
ivtype='long', ivsize=8, nvtype='double', nvsize=8, Off_t='off_t',
lseeksize=8
alignbytes=8, prototype=define
Linker and Libraries:
ld='gcc', ldflags =' -fstack-protector'
libpth=/usr/local/lib64 /lib64 /usr/lib64
libs=-lresolv -lnsl -lgdbm -ldb -ldl -lm -lcrypt -lutil -lpthread
-lc -lgdbm_compat
perllibs=-lresolv -lnsl -ldl -lm -lcrypt -lutil -lpthread -lc
libc=, so=so, useshrplib=true, libperl=libperl.so
gnulibc_version='2.14'
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef,
ccdlflags='-Wl,--enable-new-dtags -Wl,-rpath,/usr/lib64/perl5/CORE'
cccdlflags='-fPIC', lddlflags='-shared -O2 -g -pipe -Wall
-Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector
--param=ssp-buffer-size=4 -m64 -mtune=generic'
Locally applied patches:
---
@INC for perl 5.12.4:
/usr/local/lib64/perl5
/usr/local/share/perl5
/usr/lib64/perl5/vendor_perl
/usr/share/perl5/vendor_perl
/usr/lib64/perl5
/usr/share/perl5
.
---
Environment for perl 5.12.4:
HOME=/home/eda
LANG=en_GB.UTF-8
LANGUAGE (unset)
LC_COLLATE=C
LC_CTYPE=en_GB.UTF-8
LC_MESSAGES=en_GB.UTF-8
LC_MONETARY=en_GB.UTF-8
LC_NUMERIC=en_GB.UTF-8
LC_TIME=en_GB.UTF-8
LD_LIBRARY_PATH (unset)
LOGDIR (unset)
PATH=/home/eda/bin:/home/eda/bin:/usr/local/bin:/bin:/usr/bin:/sbin:/usr
/sbin:/sbin:/usr/sbin
PERL_BADLANG (unset)
SHELL=/bin/bash
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[perl #107262] Unmatched \Q \E in regexp should warn
by Ed Avis