From @xsawyerx

Created by @xsawyerx

This is a bug report for perl from xsawyerx@cpan.org,
generated with the help of perlbug 1.40 running under perl 5.22.1.

-----------------------------------------------------------------

When attempting to run "push" on a hash, we get the same error as when
on a scalar, except it still includes the word "scalar", even though
it's a hash. Haven't checked pop/shift/unshift, but I imagine they're
the same.

This was observed on both 5.22.1 and blead (past 5.25.8):

5.22.1:

$ perl -v
This is perl 5, version 22, subversion 1 (v5.22.1) built for
x86_64-linux-gnu-thread-multi

# OK
$ perl -E'push $k,1'
push on reference is experimental at -e line 1.
Not an ARRAY reference at -e line 1.

# Should be "push on hash"
$ perl -E'push %k,1'
push on reference is experimental at -e line 1.
Not an ARRAY reference at -e line 1.

5.25.8 (blead):

$ ./perl -v
This is perl 5, version 25, subversion 8 (v5.25.8
(v5.25.7-136-g1451f69)) built for x86_64-linux-thread-multi

# OK
$ ./perl -Ilib -E'push $k, "hello"'
Experimental push on scalar is now forbidden at -e line 1, at EOF

# OK
$ ./perl -Ilib -E'keys $k'
Experimental keys on scalar is now forbidden at -e line 1.
Type of arg 1 to keys must be hash or array (not scalar dereference)
at -e line 1, at EOF

# Should be "push on hash"
$ ./perl -Ilib -E'push %k, 1'
Experimental push on scalar is now forbidden at -e line 1, at EOF

Perl Info


Flags:
    category=core
    severity=low

Site configuration information for perl 5.22.1:

Configured by Debian Project at Sun Mar 13 11:54:18 UTC 2016.

Summary of my perl5 (revision 5 version 22 subversion 1) configuration:

  Platform:
    osname=linux, osvers=3.16.0, archname=x86_64-linux-gnu-thread-multi
    uname='linux localhost 3.16.0 #1 smp debian 3.16.0 x86_64 gnulinux '
    config_args='-Dusethreads -Duselargefiles
-Dcc=x86_64-linux-gnu-gcc -Dcpp=x86_64-linux-gnu-cpp
-Dld=x86_64-linux-gnu-gcc -Dccflags=-DDEBIAN -Wdate-time
-D_FORTIFY_SOURCE=2 -g -O2 -fstack-protector-strong -Wformat
-Werror=format-security -Dldflags= -Wl,-Bsymbolic-functions
-Wl,-z,relro -Dlddlflags=-shared -Wl,-Bsymbolic-functions -Wl,-z,relro
-Dcccdlflags=-fPIC -Darchname=x86_64-linux-gnu -Dprefix=/usr
-Dprivlib=/usr/share/perl/5.22
-Darchlib=/usr/lib/x86_64-linux-gnu/perl/5.22 -Dvendorprefix=/usr
-Dvendorlib=/usr/share/perl5
-Dvendorarch=/usr/lib/x86_64-linux-gnu/perl5/5.22
-Dsiteprefix=/usr/local -Dsitelib=/usr/local/share/perl/5.22.1
-Dsitearch=/usr/local/lib/x86_64-linux-gnu/perl/5.22.1
-Dman1dir=/usr/share/man/man1 -Dman3dir=/usr/share/man/man3
-Dsiteman1dir=/usr/local/man/man1 -Dsiteman3dir=/usr/local/man/man3
-Duse64bitint -Dman1ext=1 -Dman3ext=3perl
-Dpager=/usr/bin/sensible-pager -Uafs -Ud_csh -Ud_ualarm -Uusesfio
-Uusenm -Ui_libutil -Uversiononly -DDEBUGGING=-g -Doptimize=-O2 -dEs
-Duseshrplib -Dlibperl=libperl.so.5.22.1'
    hint=recommended, useposix=true, d_sigaction=define
    useithreads=define, usemultiplicity=define
    use64bitint=define, use64bitall=define, uselongdouble=undef
    usemymalloc=n, bincompat5005=undef
  Compiler:
    cc='x86_64-linux-gnu-gcc', ccflags ='-D_REENTRANT -D_GNU_SOURCE
-DDEBIAN -fwrapv -fno-strict-aliasing -pipe -I/usr/local/include
-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
    optimize='-O2 -g',
    cppflags='-D_REENTRANT -D_GNU_SOURCE -DDEBIAN -fwrapv
-fno-strict-aliasing -pipe -I/usr/local/include'
    ccversion='', gccversion='5.3.1 20160311', gccosandvers=''
    intsize=4, longsize=8, ptrsize=8, doublesize=8,
byteorder=12345678, doublekind=3
    d_longlong=define, longlongsize=8, d_longdbl=define,
longdblsize=16, longdblkind=3
    ivtype='long', ivsize=8, nvtype='double', nvsize=8, Off_t='off_t',
lseeksize=8
    alignbytes=8, prototype=define
  Linker and Libraries:
    ld='x86_64-linux-gnu-gcc', ldflags =' -fstack-protector-strong
-L/usr/local/lib'
    libpth=/usr/local/lib
/usr/lib/gcc/x86_64-linux-gnu/5/include-fixed
/usr/include/x86_64-linux-gnu /usr/lib /lib/x86_64-linux-gnu
/lib/../lib /usr/lib/x86_64-linux-gnu /usr/lib/../lib /lib
    libs=-lgdbm -lgdbm_compat -ldb -ldl -lm -lpthread -lc -lcrypt
    perllibs=-ldl -lm -lpthread -lc -lcrypt
    libc=libc-2.21.so, so=so, useshrplib=true, libperl=libperl.so.5.22
    gnulibc_version='2.21'
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E'
    cccdlflags='-fPIC', lddlflags='-shared -L/usr/local/lib
-fstack-protector-strong'

Locally applied patches:
    DEBPKG:debian/cpan_definstalldirs - Provide a sensible INSTALLDIRS
default for modules installed from CPAN.
    DEBPKG:debian/db_file_ver - http://bugs.debian.org/340047 Remove
overly restrictive DB_File version check.
    DEBPKG:debian/doc_info - Replace generic man(1) instructions with
Debian-specific information.
    DEBPKG:debian/enc2xs_inc - http://bugs.debian.org/290336 Tweak
enc2xs to follow symlinks and ignore missing @INC directories.
    DEBPKG:debian/errno_ver - http://bugs.debian.org/343351 Remove
Errno version check due to upgrade problems with long-running
processes.
    DEBPKG:debian/libperl_embed_doc - http://bugs.debian.org/186778
Note that libperl-dev package is required for embedded linking
    DEBPKG:fixes/respect_umask - Respect umask during installation
    DEBPKG:debian/writable_site_dirs - Set umask approproately for
site install directories
    DEBPKG:debian/extutils_set_libperl_path - EU:MM: set location of
libperl.a under /usr/lib
    DEBPKG:debian/no_packlist_perllocal - Don't install .packlist or
perllocal.pod for perl or vendor
    DEBPKG:debian/fakeroot - Postpone LD_LIBRARY_PATH evaluation to
the binary targets.
    DEBPKG:debian/instmodsh_doc - Debian policy doesn't install
.packlist files for core or vendor.
    DEBPKG:debian/ld_run_path - Remove standard libs from LD_RUN_PATH
as per Debian policy.
    DEBPKG:debian/libnet_config_path - Set location of libnet.cfg to
/etc/perl/Net as /usr may not be writable.
    DEBPKG:debian/mod_paths - Tweak @INC ordering for Debian
    DEBPKG:debian/prune_libs - http://bugs.debian.org/128355 Prune the
list of libraries wanted to what we actually need.
    DEBPKG:fixes/net_smtp_docs - [rt.cpan.org #36038]
http://bugs.debian.org/100195 Document the Net::SMTP 'Port' option
    DEBPKG:debian/perlivp - http://bugs.debian.org/510895 Make perlivp
skip include directories in /usr/local
    DEBPKG:debian/deprecate-with-apt - http://bugs.debian.org/747628
Point users to Debian packages of deprecated core modules
    DEBPKG:debian/squelch-locale-warnings -
http://bugs.debian.org/508764 Squelch locale warnings in Debian
package maintainer scripts
    DEBPKG:debian/skip-upstream-git-tests - Skip tests specific to the
upstream Git repository
    DEBPKG:debian/patchlevel - http://bugs.debian.org/567489 List
packaged patches for 5.22.1-9 in patchlevel.h
    DEBPKG:debian/skip-kfreebsd-crash - http://bugs.debian.org/628493
[perl #96272] Skip a crashing test case in t/op/threads.t on
GNU/kFreeBSD
    DEBPKG:fixes/document_makemaker_ccflags -
http://bugs.debian.org/628522 [rt.cpan.org #68613] Document that
CCFLAGS should include $Config{ccflags}
    DEBPKG:debian/find_html2text - http://bugs.debian.org/640479
Configure CPAN::Distribution with correct name of html2text
    DEBPKG:debian/perl5db-x-terminal-emulator.patch -
http://bugs.debian.org/668490 Invoke x-terminal-emulator rather than
xterm in perl5db.pl
    DEBPKG:debian/cpan-missing-site-dirs -
http://bugs.debian.org/688842 Fix CPAN::FirstTime defaults with
nonexisting site dirs if a parent is writable
    DEBPKG:fixes/memoize_storable_nstore - [rt.cpan.org #77790]
http://bugs.debian.org/587650 Memoize::Storable: respect 'nstore'
option not respected
    DEBPKG:debian/regen-skip - Skip a regeneration check in unrelated
git repositories
    DEBPKG:debian/makemaker-pasthru - http://bugs.debian.org/758471
Pass LD settings through to subdirectories
    DEBPKG:fixes/pod_man_reproducible_date -
http://bugs.debian.org/759405 Support POD_MAN_DATE in Pod::Man for the
left-hand footer
    DEBPKG:debian/locale-robustness - http://bugs.debian.org/782068
[perl #124310] Make t/run/locale.t survive missing locales masked by
LC_ALL
    DEBPKG:fixes/podman-utc - http://bugs.debian.org/780259 Make the
embedded date from Pod::Man reproducible
    DEBPKG:fixes/podman-utc-docs - http://bugs.debian.org/780259
Documentation and test suite updates for UTC fix
    DEBPKG:fixes/podman-empty-date - http://bugs.debian.org/780259
Support an empty POD_MAN_DATE environment variable
    DEBPKG:fixes/podman-pipe - http://bugs.debian.org/777405 Better
errors for man pages from standard input
    DEBPKG:debian/pod2man-customized - Update porting/customized.dat
for pod2man modifications
    DEBPKG:debian/makemaker-manext - http://bugs.debian.org/247370
Make EU::MakeMaker honour MANnEXT settings in generated manpage
headers
    DEBPKG:debian/makemaker_customized - Update
t/porting/customized.dat for files patched in Debian
    DEBPKG:debian/do-not-record-build-date - [6baa8db]
http://bugs.debian.org/774422 [perl #125830] Allow overriding the
compile time in "perl -V" output
    DEBPKG:fixes/podman-source-date-epoch -
http://bugs.debian.org/801621 Make Pod::Man honor the
SOURCE_DATE_EPOCH environment variable
    DEBPKG:fixes/podman-source-date-epoch-cleanups -
http://bugs.debian.org/801621 Coding style and documentation for
SOURCE_EPOCH_DATE
    DEBPKG:fixes/podman-source-date-epoch-testfix -
http://bugs.debian.org/807086 Guard for building with
SOURCE_DATE_EPOCH or POD_MAN_DATE set
    DEBPKG:debian/devel-ppport-reproducibility -
http://bugs.debian.org/801523 Sort the list of XS code files when
generating RealPPPort.xs
    DEBPKG:fixes/encode-unicode-bom - http://bugs.debian.org/798727
[rt.cpan.org #107043] Address
https://rt.cpan.org/Public/Bug/Display.html?id=107043
    DEBPKG:debian/encode-unicode-bom-doc -
http://bugs.debian.org/798727 Document Debian backport of
Encode::Unicode fix
    DEBPKG:debian/kfreebsd-softupdates - http://bugs.debian.org/796798
Work around Debian Bug#796798
    DEBPKG:fixes/autodie-scope - http://bugs.debian.org/798096 Fix a
scoping issue with "no autodie" and the "system" sub
    DEBPKG:debian/debugperl-compat-fix - [perl #127212]
http://bugs.debian.org/810326 Disable PERL_TRACK_MEMPOOL for debugging
builds
    DEBPKG:fixes/CVE-2015-8607_file_spec_taint_fix -
http://bugs.debian.org/810719 [perl #126862] ensure
File::Spec::canonpath() preserves taint
    DEBPKG:fixes/mkstemp-umask - http://bugs.debian.org/810924 [perl
#127322] [e57270b] Fix umask for mkstemp(3) calls
    DEBPKG:fixes/crosscompile-no-targethost - [perl #127234] Fix the
Configure escape with usecrosscompile but no targethost
    DEBPKG:fixes/podlators-no-encode - [rt.cpan.org #111156] Degrade
gracefully if utf8 is requested but Encode is not available
    DEBPKG:debian/cross-time-hires - [rt.cpan.org #111391] Add an
environment variable to skip running configuration probes
    DEBPKG:fixes/encode-unicode-pod - Unicode.pm: Fix POD error
    DEBPKG:fixes/memoize-pod - [rt.cpan.org #89441] Fix POD errors in Memoize
    DEBPKG:fixes/ok-pod - Added encoding for pod.
    DEBPKG:fixes/CVE-2016-2381_duplicate_env - remove duplicate
environment variables from environ


@INC for perl 5.22.1:
    /home/sawyer/perl5/lib/perl5/5.22.1/x86_64-linux-gnu-thread-multi
    /home/sawyer/perl5/lib/perl5/5.22.1
    /home/sawyer/perl5/lib/perl5/x86_64-linux-gnu-thread-multi
    /home/sawyer/perl5/lib/perl5
    /home/sawyer/perl5/lib/perl5/5.22.1/x86_64-linux-gnu-thread-multi
    /home/sawyer/perl5/lib/perl5/5.22.1
    /home/sawyer/perl5/lib/perl5/x86_64-linux-gnu-thread-multi
    /home/sawyer/perl5/lib/perl5
    /etc/perl
    /usr/local/lib/x86_64-linux-gnu/perl/5.22.1
    /usr/local/share/perl/5.22.1
    /usr/lib/x86_64-linux-gnu/perl5/5.22
    /usr/share/perl5
    /usr/lib/x86_64-linux-gnu/perl/5.22
    /usr/share/perl/5.22
    /usr/local/lib/site_perl
    /usr/lib/x86_64-linux-gnu/perl-base
    .


Environment for perl 5.22.1:
    HOME=/home/sawyer
    LANG=en_US.UTF-8
    LANGUAGE=en_US
    LC_ADDRESS=en_US.UTF-8
    LC_IDENTIFICATION=en_US.UTF-8
    LC_MEASUREMENT=en_US.UTF-8
    LC_MONETARY=en_US.UTF-8
    LC_NAME=en_US.UTF-8
    LC_NUMERIC=en_US.UTF-8
    LC_PAPER=en_US.UTF-8
    LC_TELEPHONE=en_US.UTF-8
    LC_TIME=en_US.UTF-8
    LD_LIBRARY_PATH (unset)
    LOGDIR (unset)
    PATH=/home/sawyer/.screenlayout/:/home/sawyer/perl5/bin:/home/sawyer/perl5/perlbrew/bin:/home/sawyer/.screenlayout/:/home/sawyer/perl5/bin:/home/sawyer/bin:/home/sawyer/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/snap/bin
    PERL5LIB=/home/sawyer/perl5/lib/perl5:/home/sawyer/perl5/lib/perl5
    PERLBREW_BASHRC_VERSION=0.76
    PERLBREW_HOME=/home/sawyer/.perlbrew
    PERLBREW_ROOT=/home/sawyer/perl5/perlbrew
    PERL_BADLANG (unset)
    PERL_LOCAL_LIB_ROOT=/home/sawyer/perl5:/home/sawyer/perl5
    PERL_MB_OPT=--install_base "/home/sawyer/perl5"
    PERL_MM_OPT=INSTALL_BASE=/home/sawyer/perl5
    SHELL=/bin/bash

perl thinks a hash is a scalar in push/keys error messages #15774

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