Perl6::Say fails tests with perl-5.10.0-GitLive-maint-5.10-1551-gadd0c32 #9789

p5pRT · 2009-07-07T20:17:33Z

Migrated from rt.perl.org#67302 (status was 'resolved')

Searchable as RT67302$

p5pRT · 2009-07-07T20:17:33Z

From acme@astray.com

Perl6::Say fails tests with
perl-5.10.0-GitLive-maint-5.10-1551-gadd0c32 where they pass with a
real 5.10.0. It boils down to:

/home/acme/perlsnapshot/bin/perl -Ilib -e 'use Perl6::Say; use
IO::Capture::Stdout; my $capture = IO::Capture::Stdout->new();
$capture->start; say STDOUT "*"; $capture->stop; print "[" .
$capture->read . "]" '
[*]

/home/acme/perl-5.10.0/bin/perl -e 'use Perl6::Say; use
IO::Capture::Stdout; my $capture = IO::Capture::Stdout->new();
$capture->start; say STDOUT "*"; $capture->stop; print "[" .
$capture->read . "]" '
[*
]

The outputs should be the same. They are different. That's as far as I have got.

The modules ar ethe same version on both:

/home/acme/perlsnapshot/bin/perl -Ilib -e 'use Perl6::Say; use
IO::Capture::Stdout; say $Perl6::Say::VERSION . ", " .
$IO::Capture::VERSION'
0.15, 0.05

/home/acme/perl-5.10.0/bin/perl -e 'use Perl6::Say; use
IO::Capture::Stdout; say $Perl6::Say::VERSION . ", " .
$IO::Capture::VERSION'
0.15, 0.05

My 5.10.0:

Summary of my perl5 (revision 5 version 10 subversion 0) configuration:
Platform:
osname=linux, osvers=2.6.28-11-generic, archname=i686-linux
uname='linux tigger 2.6.28-11-generic #42-ubuntu smp fri apr 17
01:57:59 utc 2009 i686 gnulinux '
config_args='-ds -e -Dprefix=/home/acme/perl-5.10.0'
hint=recommended, useposix=true, d_sigaction=define
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='cc', 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='4.3.3', 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=-lnsl -ldl -lm -lcrypt -lutil -lc
perllibs=-lnsl -ldl -lm -lcrypt -lutil -lc
libc=/lib/libc-2.9.so, so=so, useshrplib=false, libperl=libperl.a
gnulibc_version='2.9'
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E'
cccdlflags='-fPIC', lddlflags='-shared -O2 -L/usr/local/lib'

Characteristics of this binary (from libperl):
Compile-time options: PERL_DONT_CREATE_GVSV PERL_MALLOC_WRAP
USE_LARGE_FILES USE_PERLIO
Built under linux
Compiled at May 30 2009 09:44:46
%ENV:
PERL5LIB=""
PERL5OPT=""
PERL5_CPANPLUS_IS_RUNNING="15515"
PERL5_CPAN_IS_RUNNING="15515"
@INC:
/home/acme/perl-5.10.0/lib/5.10.0/i686-linux
/home/acme/perl-5.10.0/lib/5.10.0
/home/acme/perl-5.10.0/lib/site_perl/5.10.0/i686-linux
/home/acme/perl-5.10.0/lib/site_perl/5.10.0
.

My perl-5.10.0-GitLive-maint-5.10-1551-gadd0c32:

Summary of my perl5 (revision 5 version 10 subversion 0) configuration:

Platform:
osname=linux, osvers=2.6.28-13-generic, archname=i686-linux
uname='linux tigger 2.6.28-13-generic #45-ubuntu smp tue jun 30
19:49:51 utc 2009 i686 gnulinux '
config_args='-ds -e -Dprefix=/home/acme/perlsnapshot'
hint=recommended, useposix=true, d_sigaction=define
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='cc', ccflags ='-fno-strict-aliasing -pipe -fstack-protector
-I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
optimize='-O2',
cppflags='-fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include'
ccversion='', gccversion='4.3.3', 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 =' -fstack-protector -L/usr/local/lib'
libpth=/usr/local/lib /lib /usr/lib /usr/lib64
libs=-lnsl -ldl -lm -lcrypt -lutil -lc
perllibs=-lnsl -ldl -lm -lcrypt -lutil -lc
libc=/lib/libc-2.9.so, so=so, useshrplib=false, libperl=libperl.a
gnulibc_version='2.9'
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E'
cccdlflags='-fPIC', lddlflags='-shared -O2 -L/usr/local/lib
-fstack-protector'

Characteristics of this binary (from libperl):
Compile-time options: PERL_DONT_CREATE_GVSV PERL_MALLOC_WRAP
USE_LARGE_FILES USE_PERLIO
Built under linux
Compiled at Jul 7 2009 20:13:38
%ENV:
PERL5LIB=""
PERL5OPT=""
PERL5_CPANPLUS_IS_RUNNING="15515"
PERL5_CPAN_IS_RUNNING="15515"
@INC:
/home/acme/perlsnapshot/lib/5.10.0/i686-linux
/home/acme/perlsnapshot/lib/5.10.0
/home/acme/perlsnapshot/lib/site_perl/5.10.0/i686-linux
/home/acme/perlsnapshot/lib/site_perl/5.10.0
.

Enjoy, Léon

p5pRT · 2009-07-07T21:29:45Z

From p5p@spam.wizbit.be

On Tue Jul 07 13:17:33 2009, acme wrote:

Perl6::Say fails tests with
perl-5.10.0-GitLive-maint-5.10-1551-gadd0c32 where they pass with a
real 5.10.0. It boils down to:

/home/acme/perlsnapshot/bin/perl -Ilib -e 'use Perl6::Say; use
IO::Capture::Stdout; my $capture = IO::Capture::Stdout->new();
$capture->start; say STDOUT "*"; $capture->stop; print "[" .
$capture->read . "]" '
[*]

/home/acme/perl-5.10.0/bin/perl -e 'use Perl6::Say; use
IO::Capture::Stdout; my $capture = IO::Capture::Stdout->new();
$capture->start; say STDOUT "*"; $capture->stop; print "[" .
$capture->read . "]" '
[*
]

The outputs should be the same. They are different. That's as far as I
have got.

On perl-5.10.0 IO::Handle::say looked like:

sub say {
@_ or croak 'usage: $io->say(ARGS)';
my $this = shift;
print $this @_, "\n";
}

This was not correct since now the output really is: join("", @_, $,
"\n", $\);

This changed and eventually ended with:

http://perl5.git.perl.org/perl.git/blobdiff/
85c5664..841835c:/
ext/IO/lib/IO/Handle.pm

It now reads (in blead and maint):

sub say {
@_ or croak 'usage: $io->say(ARGS)';
my $this = shift;
local $\ = "\n";
print $this @_;
}

Which is the correct behaviour.

But this change exposes a bug in Perl6::Say::say and in
IO::Capture::Tie_STDx::PRINT.

1) Perl6::Say::say is implemented as:
sub say {
...
my $res = print {$handle} @_, "\n";

Which is not correct when $, and $\ are not set to the default value.
For example:

$ perl -MPerl6::Say -we '$,=" FS ";$\=" RS ";say "foo";printf "\n";'
foo FS
RS

vs

$ perl-5.10.0 -wE '$,=" FS ";$\=" RS ";say "foo";printf "\n";'
foo

2) IO::Capture::Tie_STDx::PRINT

sub PRINT {
my $self = shift;
push @$self, join '',@_;
}

This is not correct.
It completly ignores the record separtor.
It should be: push @$self, join '',@_,$\;

Best Regards,

Bram

p5pRT · 2009-07-07T21:29:46Z

The RT System itself - Status changed from 'new' to 'open'

p5pRT · 2009-07-07T21:45:08Z

From p5p@spam.wizbit.be

On Tue Jul 07 14:29:45 2009, animator wrote:

On Tue Jul 07 13:17:33 2009, acme wrote:

Perl6::Say fails tests with
perl-5.10.0-GitLive-maint-5.10-1551-gadd0c32 where they pass with a
real 5.10.0. It boils down to:

/home/acme/perlsnapshot/bin/perl -Ilib -e 'use Perl6::Say; use
IO::Capture::Stdout; my $capture = IO::Capture::Stdout->new();
$capture->start; say STDOUT "*"; $capture->stop; print "[" .
$capture->read . "]" '
[*]

/home/acme/perl-5.10.0/bin/perl -e 'use Perl6::Say; use
IO::Capture::Stdout; my $capture = IO::Capture::Stdout->new();
$capture->start; say STDOUT "*"; $capture->stop; print "[" .
$capture->read . "]" '
[*
]

The outputs should be the same. They are different. That's as far as
I
have got.

On perl-5.10.0 IO::Handle::say looked like:

sub say {
@_ or croak 'usage: $io->say(ARGS)';
my $this = shift;
print $this @_, "\n";
}

This was not correct since now the output really is: join("", @_, $,
"\n", $\);

This changed and eventually ended with:

http://perl5.git.perl.org/perl.git/blobdiff/

85c5664..841835c:/

ext/IO/lib/IO/Handle.pm

It now reads (in blead and maint):

sub say {
@_ or croak 'usage: $io->say(ARGS)';
my $this = shift;
local $\ = "\n";
print $this @_;
}

Which is the correct behaviour.

But this change exposes a bug in Perl6::Say::say and in
IO::Capture::Tie_STDx::PRINT.

1) Perl6::Say::say is implemented as:
sub say {
...
my $res = print {$handle} @_, "\n";

Which is not correct when $, and $\ are not set to the default value.
For example:

$ perl -MPerl6::Say -we '$,=" FS ";$\=" RS ";say "foo";printf "\n";'
foo FS
RS

vs

$ perl-5.10.0 -wE '$,=" FS ";$\=" RS ";say "foo";printf "\n";'
foo

2) IO::Capture::Tie_STDx::PRINT

sub PRINT {
my $self = shift;
push @$self, join '',@_;
}

This is not correct.
It completly ignores the record separtor.
It should be: push @$self, join '',@_,$\;

One more thought on this:

Perl6::Say v0.02 used:

print {$fh} @_, defined $\ ? "" : "\n"

Perl6::Say v0.03 uses:

print {$handle} @_, "\n";

The Changelog reads:

Changed $\ interaction in line with changes in Perl 6 design (C<say
@stuff> is now always equivalent to C<print @stuff, "\n">)

So the real question:

How does say behave in Perl 6? (And/or does Perl 6 has a field and
output record separator?)

Best regards,

Bram

p5pRT · 2013-02-23T03:30:45Z

From @jkeenan

On Tue Jul 07 13:17:33 2009, acme wrote:

Perl6::Say fails tests with
perl-5.10.0-GitLive-maint-5.10-1551-gadd0c32 where they pass with a
real 5.10.0. It boils down to:

/home/acme/perlsnapshot/bin/perl -Ilib -e 'use Perl6::Say; use
IO::Capture::Stdout; my $capture = IO::Capture::Stdout->new();
$capture->start; say STDOUT "*"; $capture->stop; print "[" .
$capture->read . "]" '
[*]

/home/acme/perl-5.10.0/bin/perl -e 'use Perl6::Say; use
IO::Capture::Stdout; my $capture = IO::Capture::Stdout->new();
$capture->start; say STDOUT "*"; $capture->stop; print "[" .
$capture->read . "]" '
[*
]

The outputs should be the same. They are different. That's as far as I
have got.

The modules ar ethe same version on both:

/home/acme/perlsnapshot/bin/perl -Ilib -e 'use Perl6::Say; use
IO::Capture::Stdout; say $Perl6::Say::VERSION . ", " .
$IO::Capture::VERSION'
0.15, 0.05

/home/acme/perl-5.10.0/bin/perl -e 'use Perl6::Say; use
IO::Capture::Stdout; say $Perl6::Say::VERSION . ", " .
$IO::Capture::VERSION'
0.15, 0.05

My 5.10.0:

Summary of my perl5 (revision 5 version 10 subversion 0)
configuration:
Platform:
osname=linux, osvers=2.6.28-11-generic, archname=i686-linux
uname='linux tigger 2.6.28-11-generic #42-ubuntu smp fri apr 17
01:57:59 utc 2009 i686 gnulinux '
config_args='-ds -e -Dprefix=/home/acme/perl-5.10.0'
hint=recommended, useposix=true, d_sigaction=define
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='cc', 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='4.3.3', 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=-lnsl -ldl -lm -lcrypt -lutil -lc
perllibs=-lnsl -ldl -lm -lcrypt -lutil -lc
libc=/lib/libc-2.9.so, so=so, useshrplib=false, libperl=libperl.a
gnulibc_version='2.9'
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E'
cccdlflags='-fPIC', lddlflags='-shared -O2 -L/usr/local/lib'

Characteristics of this binary (from libperl):
Compile-time options: PERL_DONT_CREATE_GVSV PERL_MALLOC_WRAP
USE_LARGE_FILES USE_PERLIO
Built under linux
Compiled at May 30 2009 09:44:46
%ENV:
PERL5LIB=""
PERL5OPT=""
PERL5_CPANPLUS_IS_RUNNING="15515"
PERL5_CPAN_IS_RUNNING="15515"
@INC:
/home/acme/perl-5.10.0/lib/5.10.0/i686-linux
/home/acme/perl-5.10.0/lib/5.10.0
/home/acme/perl-5.10.0/lib/site_perl/5.10.0/i686-linux
/home/acme/perl-5.10.0/lib/site_perl/5.10.0
.

My perl-5.10.0-GitLive-maint-5.10-1551-gadd0c32:

Summary of my perl5 (revision 5 version 10 subversion 0)
configuration:

Platform:
osname=linux, osvers=2.6.28-13-generic, archname=i686-linux
uname='linux tigger 2.6.28-13-generic #45-ubuntu smp tue jun 30
19:49:51 utc 2009 i686 gnulinux '
config_args='-ds -e -Dprefix=/home/acme/perlsnapshot'
hint=recommended, useposix=true, d_sigaction=define
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='cc', ccflags ='-fno-strict-aliasing -pipe -fstack-protector
-I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
optimize='-O2',
cppflags='-fno-strict-aliasing -pipe -fstack-protector
-I/usr/local/include'
ccversion='', gccversion='4.3.3', 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 =' -fstack-protector -L/usr/local/lib'
libpth=/usr/local/lib /lib /usr/lib /usr/lib64
libs=-lnsl -ldl -lm -lcrypt -lutil -lc
perllibs=-lnsl -ldl -lm -lcrypt -lutil -lc
libc=/lib/libc-2.9.so, so=so, useshrplib=false, libperl=libperl.a
gnulibc_version='2.9'
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E'
cccdlflags='-fPIC', lddlflags='-shared -O2 -L/usr/local/lib
-fstack-protector'

Characteristics of this binary (from libperl):
Compile-time options: PERL_DONT_CREATE_GVSV PERL_MALLOC_WRAP
USE_LARGE_FILES USE_PERLIO
Built under linux
Compiled at Jul 7 2009 20:13:38
%ENV:
PERL5LIB=""
PERL5OPT=""
PERL5_CPANPLUS_IS_RUNNING="15515"
PERL5_CPAN_IS_RUNNING="15515"
@INC:
/home/acme/perlsnapshot/lib/5.10.0/i686-linux
/home/acme/perlsnapshot/lib/5.10.0
/home/acme/perlsnapshot/lib/site_perl/5.10.0/i686-linux
/home/acme/perlsnapshot/lib/site_perl/5.10.0
.

Enjoy, L�on

I reviewed this older ticket tonight. I should first note that it is of
no practical consequence, since the 'say' function is a Perl built-in as
of Perl 5.10.0.

That being said, my hunch is that the problem Léon describes is a side
effect of the CPAN module he used to capture the output. For some
reason, IO::Capture::Stdout behaves differently pre- and post-Perl 5.10.
But if we use a different capturing mechanism, we get consistent
results both pre- and post-5.10.

Using IO::Capture::Stdout:

##########

$ /usr/bin/perl -v
This is perl, v5.8.6 built for darwin-thread-multi-2level
(with 5 registered patches, see perl -V for more detail)
...

$ /usr/bin/perl -Ilib -I/usr/local/lib/perl5/site_perl/5.10.0
-MPerl6::Say -MIO::Capture::Stdout -e 'my $capture =
IO::Capture::Stdout->new();$capture->start; say STDOUT "*";
$capture->stop; print "[" .
$capture->read . "]" '
[*
]

$ perl -v
This is perl 5, version 16, subversion 0 (v5.16.0) built for darwin-2level
...

$ perl -MPerl6::Say -MIO::Capture::Stdout -e 'my $capture =
IO::Capture::Stdout->new();
$capture->start; say STDOUT "*"; $capture->stop; print "[" .
$capture->read . "]" '
[*]

##########

Now, using IO::CaptureOutput::capture():

Perl 5.8.6

$ /usr/bin/perl -I/usr/local/lib/perl5/site_perl/5.10.0 -MPerl6::Say
-MIO::CaptureOutput -e 'IO::CaptureOutput::capture(sub {say STDOUT
"*";}, \$stdout, \$stderr); print "[".$stdout."]";'
[*
]

Perl 5.16.0

$ perl -MPerl6::Say -MIO::CaptureOutput -e
'IO::CaptureOutput::capture(sub {say STDOUT "*";}, \$stdout, \$stderr);
print "[".$stdout."]";'
[*
]

##########

With IO::CaptureOutput we get consistent results for Perl6::Say across
Perl versions. Inference: the problem lies in IO::Capture::Stdout more
than in Perl.

I will close this ticket in 7 days unless someone wishes to take it over.

Thank you very much.
Jim Keenan

p5pRT · 2013-03-02T19:53:13Z

From @jkeenan

On Fri Feb 22 19:30:45 2013, jkeenan wrote:

With IO::CaptureOutput we get consistent results for Perl6::Say across
Perl versions. Inference: the problem lies in IO::Capture::Stdout more
than in Perl.

I will close this ticket in 7 days unless someone wishes to take it over.

Thank you very much.
Jim Keenan

Closing as scheduled.

p5pRT · 2013-03-02T19:53:14Z

@jkeenan - Status changed from 'open' to 'resolved'

p5pRT closed this as completed Mar 2, 2013

p5pRT added Severity Low distro-Linux labels Oct 18, 2019

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Perl6::Say fails tests with perl-5.10.0-GitLive-maint-5.10-1551-gadd0c32 #9789

Perl6::Say fails tests with perl-5.10.0-GitLive-maint-5.10-1551-gadd0c32 #9789

p5pRT commented Jul 7, 2009

p5pRT commented Jul 7, 2009

p5pRT commented Jul 7, 2009

p5pRT commented Jul 7, 2009

p5pRT commented Jul 7, 2009

p5pRT commented Feb 23, 2013

p5pRT commented Mar 2, 2013

p5pRT commented Mar 2, 2013

Perl6::Say fails tests with perl-5.10.0-GitLive-maint-5.10-1551-gadd0c32 #9789

Perl6::Say fails tests with perl-5.10.0-GitLive-maint-5.10-1551-gadd0c32 #9789

Comments

p5pRT commented Jul 7, 2009

p5pRT commented Jul 7, 2009

From acme@astray.com

p5pRT commented Jul 7, 2009

From p5p@spam.wizbit.be

p5pRT commented Jul 7, 2009

p5pRT commented Jul 7, 2009

From p5p@spam.wizbit.be

p5pRT commented Feb 23, 2013

From @jkeenan

p5pRT commented Mar 2, 2013

From @jkeenan

p5pRT commented Mar 2, 2013