$@ = 100; die doesn't propagate 100 #17098

p5pRT · 2019-07-17T01:07:13Z

Migrated from rt.perl.org#134291 (status was 'pending release')

Searchable as RT134291$

p5pRT · 2019-07-17T01:07:14Z

From @tonycoz

toddr pointed this out in IRC:

05:50 < toddr> TonyC after 8b3945e, the output
of this changed: perl -e '$@ = 123; die'
05:50 < toddr> is that a bug?
05:51 < toddr> If it's not an IV, then you get different output.

Similarly for NVs.

tony@mars:.../git/perl$ ./perl -e '$@ = 123; die'
Died at -e line 1.
tony@mars:.../git/perl$ ./perl -e '$@ = "123"; die'
123 ...propagated at -e line 1.
tony@mars:.../git/perl$ ./perl -e '$@ = 3.14; die'
Died at -e line 1.

Patch soon

Perl Info


Flags:
    category=core
    severity=medium

Summary of my perl5 (revision 5 version 31 subversion 2) configuration:
  Commit id: 973ae08839a3c974ff88014594ecf63cdb20d5e8
  Platform:
    osname=linux
    osvers=4.9.0-9-amd64
    archname=x86_64-linux
    uname='linux mars 4.9.0-9-amd64 #1 smp debian 4.9.168-1+deb9u3 (2019-06-16) x86_64 gnulinux '
    config_args='-des -Dusedevel -Doptimize=-O0 -g -DDEBUGGING'
    hint=recommended
    useposix=true
    d_sigaction=define
    useithreads=undef
    usemultiplicity=undef
    use64bitint=define
    use64bitall=define
    uselongdouble=undef
    usemymalloc=n
    default_inc_excludes_dot=define
    bincompat5005=undef
  Compiler:
    cc='cc'
    ccflags ='-fwrapv -DDEBUGGING -fno-strict-aliasing -pipe -fstack-protector-strong -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_FORTIFY_SOURCE=2'
    optimize='-O0 -g'
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    nvtype='double'
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    Off_t='off_t'
    lseeksize=8
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  Linker and Libraries:
    ld='cc'
    ldflags =' -fstack-protector-strong -L/usr/local/lib'
    libpth=/usr/local/lib /usr/lib/gcc/x86_64-linux-gnu/6/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 /lib64 /usr/lib64
    libs=-lpthread -lnsl -lgdbm -ldb -ldl -lm -lcrypt -lutil -lc -lgdbm_compat
    perllibs=-lpthread -lnsl -ldl -lm -lcrypt -lutil -lc
    libc=libc-2.24.so
    so=so
    useshrplib=false
    libperl=libperl.a
    gnulibc_version='2.24'
  Dynamic Linking:
    dlsrc=dl_dlopen.xs
    dlext=so
    d_dlsymun=undef
    ccdlflags='-Wl,-E'
    cccdlflags='-fPIC'
    lddlflags='-shared -O0 -g -L/usr/local/lib -fstack-protector-strong'


Characteristics of this binary (from libperl): 
  Compile-time options:
    DEBUGGING
    HAS_TIMES
    PERLIO_LAYERS
    PERL_COPY_ON_WRITE
    PERL_DONT_CREATE_GVSV
    PERL_MALLOC_WRAP
    PERL_OP_PARENT
    PERL_PRESERVE_IVUV
    PERL_USE_DEVEL
    USE_64_BIT_ALL
    USE_64_BIT_INT
    USE_LARGE_FILES
    USE_LOCALE
    USE_LOCALE_COLLATE
    USE_LOCALE_CTYPE
    USE_LOCALE_NUMERIC
    USE_LOCALE_TIME
    USE_PERLIO
    USE_PERL_ATOF
  Locally applied patches:
    uncommitted-changes
  Built under linux
  Compiled at Jul 17 2019 10:48:14
  %ENV:
    PERLBREW_BASHRC_VERSION="0.43"
    PERLBREW_HOME="/home/tony/.perlbrew"
    PERLBREW_MANPATH=""
    PERLBREW_PATH="/home/tony/perl5/perlbrew/bin"
    PERLBREW_ROOT="/home/tony/perl5/perlbrew"
    PERLBREW_VERSION="0.67"
  @INC:
    lib
    /usr/local/lib/perl5/site_perl/5.31.2/x86_64-linux
    /usr/local/lib/perl5/site_perl/5.31.2
    /usr/local/lib/perl5/5.31.2/x86_64-linux
    /usr/local/lib/perl5/5.31.2

p5pRT · 2019-07-17T01:33:46Z

From @tonycoz

On Tue, 16 Jul 2019 18:07:14 -0700, tonyc wrote:

Patch soon

Attached.

I'll apply this soon.

Tony

p5pRT · 2019-07-17T01:33:46Z

From @tonycoz

0001-perl-134291-propagate-non-PVs-in-in-bare-die.patch

From dac821a895ae3a7d26ea9f9f6b6d2e48592a3fe0 Mon Sep 17 00:00:00 2001
From: Tony Cook <tony@develop-help.com>
Date: Wed, 17 Jul 2019 11:32:50 +1000
Subject: (perl #134291) propagate non-PVs in $@ in bare die()

---
 pp_sys.c   | 2 +-
 t/op/die.t | 6 +++++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/pp_sys.c b/pp_sys.c
index 0214367ea6..251527785e 100644
--- a/pp_sys.c
+++ b/pp_sys.c
@@ -498,7 +498,7 @@ PP(pp_die)
 		}
 	    }
 	}
-	else if (SvPOK(errsv) && SvCUR(errsv)) {
+	else if (SvOK(errsv) && (SvPV_nomg(errsv,len), len)) {
 	    exsv = sv_mortalcopy(errsv);
 	    sv_catpvs(exsv, "\t...propagated");
 	}
diff --git a/t/op/die.t b/t/op/die.t
index ef2b85f8f5..d6d7daffa5 100644
--- a/t/op/die.t
+++ b/t/op/die.t
@@ -6,7 +6,7 @@ BEGIN {
     set_up_inc('../lib');
 }
 
-plan tests => 20;
+plan tests => 21;
 
 eval {
     eval {
@@ -94,6 +94,10 @@ like($@, qr/\.{3}propagated at/, '... and appends a phrase');
     local $SIG{__WARN__} = sub { $ok = 0 };
     eval { undef $@; die };
     is( $ok, 1, 'no warnings if $@ is undef' );
+
+    eval { $@ = 100; die };
+    like($@."", qr/100\t\.{3}propagated at/,
+         'check non-PVs in $@ are propagated');
 }
 
 TODO: {
-- 
2.11.0

p5pRT · 2019-07-17T02:21:31Z

From @toddr

Created by @toddr

We noticed today that die will not display $@ if it's an IV

$>perl -e'$@ = 123; die'
Died at -e line 1.

$>perl -e'$@ = "123"; die'
123 ...propagated at -e line 1.

I bisected it to a change just before 5.18:

8b3945e is the first bad commit
commit 8b3945e
Author: Tony Cook <tony@develop-help.com>
Date: Fri Apr 26 09:56:58 2013 +1000

[perl #117743] don't warn on $@ = undef; die;

and fix the test that's meant to detect this bug.

:100644 100644 8bf9fa7cf13daf5e5461c945266a9579c5ac0590
04ccddb9ab6a733eb4ac3453f6ccdd3a0a54fbcb M pp_sys.c
:040000 040000 6f31b960f19e960499385dbf0d1b9d96c77841c6
9795097c2f12735bdfd390742047ace3d0dc48ca M t

Perl Info


Flags:
    category=core
    severity=low

Site configuration information for perl 5.28.0:

Configured by cPanel at Fri Feb 15 18:56:31 CST 2019.

Summary of my perl5 (revision 5 version 28 subversion 0) configuration:

  Platform:
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    osvers=3.10.0-123.20.1.el7.x86_64
    archname=x86_64-linux-64int
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3.10.0-123.20.1.el7.x86_64 #1 smp thu jan 29 18:05:33 utc 2015 x86_64
x86_64 x86_64 gnulinux '
    config_args='-des -Dusedevel -Darchname=x86_64-linux-64int
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Locally applied patches:
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    cPanel - cPanel INC PATH
    cPanel - Avoid importing symbols unless requested
    cPanel - Disable termcap warning when TERM is unset
    cPanel - Do not warn when close fails because the file handle is
    cPanel - COW Static support
    cPanel - Use dup2 from Cpanel::POSIX::Tiny
    cPanel - Disable 14fileno.t tests since Cpanel::POSIX::Tiny is
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    cPanel - add Perl_DeclareStaticMemory
    cPanel - Disable xs handshake
    cPanel - Provide a way to clear swash invlists for B::C
    cPanel - Switch several CPAN modules to XSLoader
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    cPanel - Storable do not load Fcntl
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    cPanel - Reduce Scalar::Utils regex overhead
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    cPanel - Fix warning from Memoize::Expire
    cPanel - =?UTF-8?q?Allow=20=E2=80=9Cpeer=E2=80=9D=20to=20be?=
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    cPanel - Remove launcher regex in Config.pm
    cPanel - Change method of generating names for non-existent user
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    cPanel - Reduce startup size of PL_strtab
    cPanel - Perl_my_setenv(); handle integer wrap
    cPanel - add test for CVE-2018-12015 (RT #133250)
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    cPanel - (perl #133314) always close the directory handle on
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    cPanel - Avoid a warning when prompting install_help intro
    cPanel - Avoid a warning from cpan when run with warnings


@INC for perl 5.28.0:
    /usr/local/cpanel
    /usr/local/cpanel/3rdparty/perl/528/lib/perl5/cpanel_lib/x86_64-linux-64int
    /usr/local/cpanel/3rdparty/perl/528/lib/perl5/cpanel_lib
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Environment for perl 5.28.0:
    HOME=/root
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p5pRT · 2019-07-17T02:37:39Z

From nicolas@atoomic.org

this is a duplicate of what was reported and fixed earlier by Tony via RT #134291
this ticket should be close

p5pRT · 2019-07-17T02:37:39Z

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

p5pRT · 2019-07-22T01:15:55Z

From @tonycoz

On Tue, 16 Jul 2019 18:33:46 -0700, tonyc wrote:

On Tue, 16 Jul 2019 18:07:14 -0700, tonyc wrote:

Patch soon

Attached.

I'll apply this soon.

Applied as 85d4e0a.

Tony

p5pRT · 2019-07-22T01:15:55Z

@tonycoz - Status changed from 'new' to 'pending release'

p5pRT closed this as completed Jul 22, 2019

p5pRT added Severity Medium type-core labels Oct 19, 2019

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$@ = 100; die doesn't propagate 100 #17098

$@ = 100; die doesn't propagate 100 #17098

p5pRT commented Jul 17, 2019

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p5pRT commented Jul 22, 2019

p5pRT commented Jul 22, 2019

$@ = 100; die doesn't propagate 100 #17098

$@ = 100; die doesn't propagate 100 #17098

Comments

p5pRT commented Jul 17, 2019

p5pRT commented Jul 17, 2019

From @tonycoz

p5pRT commented Jul 17, 2019

From @tonycoz

p5pRT commented Jul 17, 2019

From @tonycoz

p5pRT commented Jul 17, 2019

From @toddr

Created by @toddr

p5pRT commented Jul 17, 2019

From nicolas@atoomic.org

p5pRT commented Jul 17, 2019

p5pRT commented Jul 22, 2019

From @tonycoz

p5pRT commented Jul 22, 2019