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[perl #59522] surprising behavior when $ is left off $last
# New Ticket Created by jpl@research.att.com
# Please include the string: [perl #59522]
# in the subject line of all future correspondence about this issue.
# <URL: http://rt.perl.org/rt3/Ticket/Display.html?id=59522 >
Reply-To: jpl@research.att.com
Message-Id: <5.8.8_21966_1222869873@gps>
This is a bug report for perl from jpl@research.att.com,
generated with the help of perlbug 1.35 running under perl v5.8.8.
-----------------------------------------------------------------
[Please enter your report here]
Here's a distilled version of a test suite surprise
(well, it surprised me, anyway).
suprise.pl:
===
#!/usr/bin/perl -w
use strict;
sub ok {
my $bool = shift;
print(@_, "\n") if ($bool);
}
{
my $last = 3;
my $i = 2;
ok(0 < $i && $i < $last, "In the middle"); # what I meant
ok(0 < $i && $i < last, "In the middle"); # what I wrote
}
===
I accidentally left the $ off the $last in the last statement.
What surprised me is that there was no syntax error.
There's a run-time error
Can't "last" outside a loop block at surp.pl line 13.
if I don't have the code in a block, but, being inside a block,
there are no errors at compile time or runtime.
No biggie, but it took a while to figure out why my tests
were exiting early. -- jpl
[Please do not change anything below this line]
-----------------------------------------------------------------
---
Flags:
category=core
severity=low
---
Site configuration information for perl v5.8.8:
Configured by Debian Project at Tue Nov 27 10:56:10 GMT 2007.
Summary of my perl5 (revision 5 version 8 subversion 8) configuration:
Platform:
osname=linux, osvers=2.6.15.7, archname=i486-linux-gnu-thread-multi
uname='linux palmer 2.6.15.7 #1 smp thu sep 7 19:42:20 utc 2006 i686 gnulinux '
config_args='-Dusethreads -Duselargefiles -Dccflags=-DDEBIAN -Dcccdlflags=-fPIC -Darchname=i486-linux-gnu -Dprefix=/usr -Dprivlib=/usr/share/perl/5.8 -Darchlib=/usr/lib/perl/5.8 -Dvendorprefix=/usr -Dvendorlib=/usr/share/perl5 -Dvendorarch=/usr/lib/perl5 -Dsiteprefix=/usr/local -Dsitelib=/usr/local/share/perl/5.8.8 -Dsitearch=/usr/local/lib/perl/5.8.8 -Dman1dir=/usr/share/man/man1 -Dman3dir=/usr/share/man/man3 -Dsiteman1dir=/usr/local/man/man1 -Dsiteman3dir=/usr/local/man/man3 -Dman1ext=1 -Dman3ext=3perl -Dpager=/usr/bin/sensible-pager -Uafs -Ud_csh -Ud_ualarm -Uusesfio -Uusenm -Duseshrplib -Dlibperl=libperl.so.5.8.8 -Dd_dosuid -des'
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='cc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -DTHREADS_HAVE_PIDS -DDEBIAN -fno-strict-aliasing -pipe -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
optimize='-O2',
cppflags='-D_REENTRANT -D_GNU_SOURCE -DTHREADS_HAVE_PIDS -DDEBIAN -fno-strict-aliasing -pipe -I/usr/local/include'
ccversion='', gccversion='4.2.3 20071123 (prerelease) (Ubuntu 4.2.2-3ubuntu4)', 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='cc', ldflags =' -L/usr/local/lib'
libpth=/usr/local/lib /lib /usr/lib
libs=-lgdbm -lgdbm_compat -ldb -ldl -lm -lpthread -lc -lcrypt
perllibs=-ldl -lm -lpthread -lc -lcrypt
libc=/lib/libc-2.6.1.so, so=so, useshrplib=true, libperl=libperl.so.5.8.8
gnulibc_version='2.6.1'
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 v5.8.8:
/etc/perl
/usr/local/lib/perl/5.8.8
/usr/local/share/perl/5.8.8
/usr/lib/perl5
/usr/share/perl5
/usr/lib/perl/5.8
/usr/share/perl/5.8
/usr/local/lib/site_perl
.
---
Environment for perl v5.8.8:
HOME=/home/jpl
LANG=C
LANGUAGE (unset)
LD_LIBRARY_PATH (unset)
LOGDIR (unset)
PATH=/home/jpl/i686bin:/home/jpl/bin:/honk/mysql/bin:/usr/common/bin:/bin:/usr/bin:/usr/sbin:/sbin:/usr/X11R6/bin:/bin:/bin/postscript:/usr/local/bin:/usr/local/ast/bin:/usr/games:/usr/local/wordnet1.7/bin:.
PERL_BADLANG (unset)
SHELL=/bin/ksh
- Follow-Ups from:
-
"Rafael Garcia-Suarez" <rgarciasuarez@gmail.com>
Moritz Lenz <moritz@casella.verplant.org>
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