# New Ticket Created by Colin Meyer
# Please include the string: [perl #36960]
# in the subject line of all future correspondence about this issue.
# <URL: https://rt.perl.org/rt3/Ticket/Display.html?id=36960 >
This is a bug report for perl from [EMAIL PROTECTED],
generated with the help of perlbug 1.35 running under perl v5.8.7.
-----------------------------------------------------------------
[Please enter your report here]
(Sorry if this ends up as a duplicate. I sent it from a machine that is
behind a firewall. I got a cc: copy, but several hours later, it is not
yet listed in rt.perl.org. I am resending it.)
While playing with constant folding and compiler optimizations, I
noticed something funny about B::Deparse.
It seems to strip the conditionals off of some statements, implying
that they will always be run. However, they do not get run.
Here's my test files:
A.pm:
package A;
use constant DEBUG => 1;
1;
B.pm:
package B;
use constant DEBUG => 0;
1;
test.pl:
#!/usr/local/bin/perl
$\="\n";
use lib '.';
use A; # DEBUG == 1
use B; # DEBUG == 0
use constant AorB => A::DEBUG | B::DEBUG; # 1
use constant AandB => A::DEBUG & B::DEBUG; # 0
print "A" if A::DEBUG;
print "B" if B::DEBUG;
if ( B::DEBUG ) { print "B" }
print "AorB" if AorB;
print "AandB" if AandB;
perl test.pl:
A
AorB
perl -MO=Deparse test.pl:
test syntax OK
$\ = "\n";
use lib ('.');
use A;
use B;
use constant ('AorB', 1 | 0);
use constant ('AandB', 1 & 0);
print 'A';
print 'B';
do {
print 'B'
};
print 'AorB';
'???';
Thanks for any help,
-Colin.
[Please do not change anything below this line]
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---
Flags:
category=library
severity=medium
---
Site configuration information for perl v5.8.7:
Configured by cmeyer at Thu Jul 28 15:52:04 PDT 2005.
Summary of my perl5 (revision 5 version 8 subversion 7) configuration:
Platform:
osname=linux, osvers=2.4.21-20.el.c0smp, archname=i686-linux
uname='linux dasdev0 2.4.21-20.el.c0smp #1 smp thu sep 9 01:53:25 edt 2004
i686 i686 i386 gnulinux '
config_args='-Dcc=gcc -Dprefix=/opt/perl/5.8.7-mp1 -des'
hint=recommended, useposix=true, d_sigaction=define
usethreads=undef use5005threads=undef useithreads=undef
usemultiplicity=undef
useperlio=define d_sfio=undef uselargefiles=define usesocks=undef
use64bitint=undef use64bitall=undef uselongdouble=undef
usemymalloc=n, bincompat5005=undef
Compiler:
cc='gcc', ccflags ='-fno-strict-aliasing -pipe -I/usr/local/include
-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
optimize='-O2',
cppflags='-fno-strict-aliasing -pipe -I/usr/local/include'
ccversion='', gccversion='3.2.3 20030502 (Red Hat Linux 3.2.3-52)',
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 -ldl -lm -lcrypt -lutil -lc
perllibs=-lnsl -ldl -lm -lcrypt -lutil -lc
libc=/lib/libc-2.3.2.so, so=so, useshrplib=false, libperl=libperl.a
gnulibc_version='2.3.2'
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E'
cccdlflags='-fpic', lddlflags='-shared -L/usr/local/lib'
Locally applied patches:
---
@INC for perl v5.8.7:
/home/cmeyer/perl5lib
/home/cmeyer/da/common/lib
/home/cmeyer/da/das2/lib
/opt/perl/5.8.7-mp1/lib/5.8.7/i686-linux
/opt/perl/5.8.7-mp1/lib/5.8.7
/opt/perl/5.8.7-mp1/lib/site_perl/5.8.7/i686-linux
/opt/perl/5.8.7-mp1/lib/site_perl/5.8.7
/opt/perl/5.8.7-mp1/lib/site_perl
.
---
Environment for perl v5.8.7:
HOME=/home/cmeyer
LANG=en_US
LANGUAGE (unset)
LANGVAR=en_US.UTF-8
LD_LIBRARY_PATH=:/opt/oracle/product/9.2.0/lib
LOGDIR (unset)
PATH=/usr/kerberos/bin:/usr/local/bin:/bin:/usr/bin:/usr/X11R6/bin:/sbin:/usr/sbin:/home/cmeyer/bin:/opt/oracle/product/9.2.0/bin:/home/cmeyer/bin
PERL=/opt/perl/5.8.7-mp1/bin/perl
PERL5LIB=/home/cmeyer/perl5lib:/home/cmeyer/da/common/lib:/home/cmeyer/da/das2/lib
PERL_BADLANG (unset)
SHELL=/bin/bash
