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[perl #24280] warning from undefined value in comment
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From:
perlbug-followup
Date:
October 25, 2003 12:18
Subject:
[perl #24280] warning from undefined value in comment
Message ID:
rt-24280-66432.10.1101820919174@rt.perl.org
# New Ticket Created by coyote.frank@gmx.net
# Please include the string: [perl #24280]
# in the subject line of all future correspondence about this issue.
# <URL: http://rt.perl.org/rt2/Ticket/Display.html?id=24280 >
This is a bug report for perl from coyote.frank@gmx.net,
generated with the help of perlbug 1.34 running under perl v5.8.0.
-----------------------------------------------------------------
[Please enter your report here]
m/(?x).../ seems to interpret variables in comments, leading
to unexcpected warnings, while m/.../x does not.
Example:
| use warnings;
| my $line = 'bla';
| $line =~m!(?x)
| (.*) # $1 is not yet defined, so I get a warning
| !; # regex end
| $line =~m!
| (.*) # $2 is not yet defined but I don't get a warning
| !x; # regex end
with use strict and other variable names one could even
make the syntax check fail:
| use strict;
| my $line = 'foo';
| $line =~m!(?x)(.*) # $bar is not defined
| !; # regex end
| prompt$ perl x.pl
| Global symbol "$bar" requires explicit package name at x.pl line 3.
| Execution of x.pl aborted due to compilation errors.
[Please do not change anything below this line]
-----------------------------------------------------------------
---
Flags:
category=core
severity=low
---
Site configuration information for perl v5.8.0:
Configured by pixel at Thu Mar 6 22:12:16 CET 2003.
Summary of my perl5 (revision 5.0 version 8 subversion 0) configuration:
Platform:
osname=linux, osvers=2.4.20-2mdkenterprise, archname=i386-linux-thread-multi
uname='linux no.mandrakesoft.com 2.4.20-2mdkenterprise #1 smp mon dec 9 14:28:32 cet 2002 i686 unknown unknown gnulinux '
config_args='-des -Darchname=i386-linux -Dcc=gcc -Doptimize=-O2 -fomit-frame-pointer -pipe -march=i586 -mcpu=pentiumpro -Dprefix=/usr -Dvendorprefix=/usr -Dsiteprefix=/usr -Dman3ext=3pm -Dcf_by=MandrakeSoft -Dmyhostname=localhost -Dperladmin=root@localhost -Dd_dosuid -Ud_csh -Duseshrplib -Dusethreads'
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 -fno-strict-aliasing -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -I/usr/include/gdbm',
optimize='-O2 -fomit-frame-pointer -pipe -march=i586 -mcpu=pentiumpro',
cppflags='-D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing -I/usr/include/gdbm'
ccversion='', gccversion='3.2.2 (Mandrake Linux 9.1 3.2.2-3mdk)', 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=-lnsl -lndbm -lgdbm -ldl -lm -lpthread -lc -lcrypt -lutil
perllibs=-lnsl -ldl -lm -lpthread -lc -lcrypt -lutil
libc=/lib/libc-2.3.1.so, so=so, useshrplib=true, libperl=libperl.so
gnulibc_version='2.3.1'
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-rdynamic -Wl,-rpath,/usr/lib/perl5/5.8.0/i386-linux-thread-multi/CORE'
cccdlflags='-fpic', lddlflags='-shared -L/usr/local/lib'
Locally applied patches:
---
@INC for perl v5.8.0:
/usr/lib/perl5/5.8.0/i386-linux-thread-multi
/usr/lib/perl5/5.8.0
/usr/lib/perl5/site_perl/5.8.0/i386-linux-thread-multi
/usr/lib/perl5/site_perl/5.8.0
/usr/lib/perl5/site_perl
/usr/lib/perl5/vendor_perl/5.8.0/i386-linux-thread-multi
/usr/lib/perl5/vendor_perl/5.8.0
/usr/lib/perl5/vendor_perl
.
---
Environment for perl v5.8.0:
HOME=/home/steffen
LANG=en_US
LANGUAGE=en_US:en
LC_ADDRESS=en_US
LC_COLLATE=en_US
LC_CTYPE=en_US
LC_IDENTIFICATION=en_US
LC_MEASUREMENT=en_US
LC_MESSAGES=en_US
LC_MONETARY=en_US
LC_NAME=en_US
LC_NUMERIC=en_US
LC_PAPER=en_US
LC_TELEPHONE=en_US
LC_TIME=en_US
LD_LIBRARY_PATH (unset)
LOGDIR (unset)
PATH=/home/steffen/p/bin:/home/steffen/bin:.:/home/stef/bin:/usr//bin:/bin:/usr/bin::/usr/local/bin:/usr/X11R6/bin:/usr/games:/usr/X11R6/bin:/home/stef/bin:/home/steffen/bin
PERL_BADLANG (unset)
SHELL=/bin/bash
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