This is a bug report for perl from [EMAIL PROTECTED],
generated with the help of perlbug 1.33 running under perl v5.6.1.
-----------------------------------------------------------------
[Please enter your report here]
#!/usr/bin/perl
use warnings;
$a = undef;
print $a, "\n"; # gives a warning
print "$a\n"; # is silent
print "a:$a\n"; # gives a warning
__END__
I think it should be considered a bug that the second print statement does
not give the 'Use of uninitialized value' warning.
It probably has to do with the fact that pp_concat does:
if (!SvOK(TARG))
sv_setpv(left, "");
and the reason for that is that we don't want
$a .= "foo";
to give a warning. But the result is that even things like:
$a = $something_undef . "foo";
and statements like the print above do not warn.
[Please do not change anything below this line]
-----------------------------------------------------------------
---
Flags:
category=core
severity=low
---
Site configuration information for perl v5.6.1:
Configured by neilw at Wed Oct 31 23:16:51 PST 2001.
Summary of my perl5 (revision 5.0 version 6 subversion 1) configuration:
Platform:
osname=linux, osvers=2.2.17, archname=i686-linux-thread-multi
uname='linux gimlet 2.2.17 #1 sun jun 25 09:24:41 est 2000 i686 unknown '
config_args='-des -Dcc=gcc -Dcf_by=ActiveState
[EMAIL PROTECTED] -Uinstallusrbinperl -Ud_sigsetjmp -Dusethreads
-Duseithreads -Dinc_version_list=5.6.0/$archname 5.6.0
-Dprefix=/local/perl/ActivePerl-630'
hint=recommended, useposix=true, d_sigaction=define
usethreads=define use5005threads=undef useithreads=define usemultiplicity=define
useperlio=undef d_sfio=undef uselargefiles=define usesocks=undef
use64bitint=undef use64bitall=undef uselongdouble=undef
Compiler:
cc='gcc', ccflags ='-DUSE_REENTRANT_API -D_POSIX_C_SOURCE=199506L -D_REENTRANT
-fno-strict-aliasing -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
optimize='-O2',
cppflags='-DUSE_REENTRANT_API -D_POSIX_C_SOURCE=199506L -D_REENTRANT
-fno-strict-aliasing -I/usr/local/include'
ccversion='', gccversion='2.95.2 20000220 (Debian GNU/Linux)', 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='gcc', 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-2.1.3.so, so=so, useshrplib=false, libperl=libperl.a
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-rdynamic'
cccdlflags='-fpic', lddlflags='-shared -L/usr/local/lib'
Locally applied patches:
ACTIVEPERL_LOCAL_PATCHES_ENTRY
---
@INC for perl v5.6.1:
/local/perl/ActivePerl-630/lib/5.6.1/i686-linux-thread-multi
/local/perl/ActivePerl-630/lib/5.6.1
/local/perl/ActivePerl-630/lib/site_perl/5.6.1/i686-linux-thread-multi
/local/perl/ActivePerl-630/lib/site_perl/5.6.1
/local/perl/ActivePerl-630/lib/site_perl
.
---
Environment for perl v5.6.1:
HOME=/home/gisle
LANG=en_US
LANGUAGE (unset)
LD_LIBRARY_PATH=/home/gisle/.kde/lib:/usr/lib
LOGDIR (unset)
PATH=/local/python/AP203/bin:/local/perl/bin:/local/python/bin:/local/perl/bin:/local/perl/bin:/usr/local/bin:/bin:/usr/bin:/usr/X11R6/bin:/home/gisle/bin
PERL_BADLANG (unset)
PERL_MM_USE_DEFAULT=1
SHELL=/bin/bash
