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%CORE:: not filled with builtins #13303

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p5pRT opened this issue Sep 23, 2013 · 4 comments
Open

%CORE:: not filled with builtins #13303

p5pRT opened this issue Sep 23, 2013 · 4 comments
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distro-Linux type-core Wishlist

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@p5pRT
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p5pRT commented Sep 23, 2013

Migrated from rt.perl.org#119957 (status was 'open')

Searchable as RT119957$
@p5pRT
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p5pRT commented Sep 23, 2013

From @mauke

Created by @mauke

% perl -wE 'my $x = "lc"; say *{"CORE​::$x"}{CODE}->("ASDF")'
asdf

% perl -wE 'my $x = "lc"; say *{$CORE​::{$x}}{CODE}->("ASDF")'
Can't use an undefined value as a symbol reference at -e line 1.

I can access builtins as CORE​::foo, even at runtime using symbolic references.
But $CORE​::{foo} doesn't work because %CORE​:: is (almost) empty.

Wouldn't it make sense to support access via %CORE​:: too?

Perl Info 

Flags:
    category=core
    severity=wishlist

This perlbug was built using Perl 5.12.1 - Thu Jun  3 20:09:15 CEST 2010
It is being executed now by  Perl 5.18.1 - Tue Aug 13 07:08:47 CEST 2013.

Site configuration information for perl 5.18.1:

Configured by mauke at Tue Aug 13 07:08:47 CEST 2013.

Summary of my perl5 (revision 5 version 18 subversion 1) configuration:
   
  Platform:
    osname=linux, osvers=3.5.7-gentoo, archname=i686-linux
    uname='linux nora 3.5.7-gentoo #5 preempt sat jan 26 16:46:10 cet 2013 i686 amd athlon(tm) 64 processor 3200+ authenticamd gnulinux '
    config_args=''
    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 -flto',
    cppflags='-fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include'
    ccversion='', gccversion='4.8.1', 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 ='-O2 -flto -fstack-protector -L/usr/local/lib'
    libpth=/usr/local/lib /lib/../lib /usr/lib/../lib /lib /usr/lib
    libs=-lnsl -lgdbm -ldb -ldl -lm -lcrypt -lutil -lc -lgdbm_compat
    perllibs=-lnsl -ldl -lm -lcrypt -lutil -lc
    libc=/lib/libc-2.15.so, so=so, useshrplib=false, libperl=libperl.a
    gnulibc_version='2.15'
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E'
    cccdlflags='-fPIC', lddlflags='-shared -O2 -flto -L/usr/local/lib -fstack-protector'

Locally applied patches:
    SAVEARGV0 - disable magic open in <ARGV>


@INC for perl 5.18.1:
    /home/mauke/usr/local/lib/perl5/site_perl/5.18.1/i686-linux
    /home/mauke/usr/local/lib/perl5/site_perl/5.18.1
    /home/mauke/usr/local/lib/perl5/5.18.1/i686-linux
    /home/mauke/usr/local/lib/perl5/5.18.1
    .


Environment for perl 5.18.1:
    HOME=/home/mauke
    LANG=en_US.UTF-8
    LANGUAGE (unset)
    LC_COLLATE=POSIX
    LD_LIBRARY_PATH=/home/mauke/usr/local/lib
    LOGDIR (unset)
    PATH=/home/mauke/usr/perlbrew/bin:/home/mauke/usr/local/bin:/usr/local/bin:/usr/bin:/bin:/opt/bin:/usr/i686-pc-linux-gnu/gcc-bin/4.6.3:/opt/sun-jdk-1.4.2.13/bin:/opt/sun-jdk-1.4.2.13/jre/bin:/opt/sun-jdk-1.4.2.13/jre/javaws:/opt/dmd/bin:/usr/games/bin
    PERLBREW_BASHRC_VERSION=0.43
    PERLBREW_HOME=/home/mauke/.perlbrew
    PERLBREW_PATH=/home/mauke/usr/perlbrew/bin
    PERLBREW_ROOT=/home/mauke/usr/perlbrew
    PERLBREW_VERSION=0.27
    PERL_BADLANG (unset)
    PERL_UNICODE=SAL
    SHELL=/bin/bash

@p5pRT
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p5pRT commented Sep 23, 2013

From @jkeenan

On Mon Sep 23 01​:32​:35 2013, mauke- wrote​:

This is a bug report for perl from l.mai@​web.de,
generated with the help of perlbug 1.39 running under perl 5.18.1.

-----------------------------------------------------------------
[Please describe your issue here]

% perl -wE 'my $x = "lc"; say *{"CORE​::$x"}{CODE}->("ASDF")'
asdf

$ perl -Mstrict -wE 'my $x = "lc"; say *{"CORE​::$x"}{CODE}->("ASDF");'
Can't use string ("CORE​::lc") as a symbol ref while "strict refs" in use
at -e line 1.

@p5pRT
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p5pRT commented Sep 23, 2013

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

@p5pRT
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p5pRT commented Sep 28, 2013

From @cpansprout

On Mon Sep 23 01​:32​:35 2013, mauke- wrote​:

This is a bug report for perl from l.mai@​web.de,
generated with the help of perlbug 1.39 running under perl 5.18.1.

-----------------------------------------------------------------
[Please describe your issue here]

% perl -wE 'my $x = "lc"; say *{"CORE​::$x"}{CODE}->("ASDF")'
asdf

% perl -wE 'my $x = "lc"; say *{$CORE​::{$x}}{CODE}->("ASDF")'
Can't use an undefined value as a symbol reference at -e line 1.

I can access builtins as CORE​::foo, even at runtime using symbolic
references.
But $CORE​::{foo} doesn't work because %CORE​:: is (almost) empty.

Wouldn't it make sense to support access via %CORE​:: too?

For efficiency, perl does not bother creating all built-in variables at
startup. You will also find $​::{'$'} empty. Coresubs do the same thing.

--

Father Chrysostomos

@xenu xenu removed the affects-5.18 label Nov 19, 2021
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