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5.26.1 sanitize=undefined #16176

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p5pRT opened this issue Sep 28, 2017 · 18 comments
Closed

5.26.1 sanitize=undefined #16176

p5pRT opened this issue Sep 28, 2017 · 18 comments

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@p5pRT
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@p5pRT p5pRT commented Sep 28, 2017

Migrated from rt.perl.org#132177 (status was 'resolved')

Searchable as RT132177$

@p5pRT
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@p5pRT p5pRT commented Sep 28, 2017

From @nigelhorne

Created by @nigelhorne

This is a bug report for perl from njh@​bandsman.co.uk,
generated with the help of perlbug 1.40 running under perl 5.26.1.

-----------------------------------------------------------------
I've built a Perl5.26.1 with -fsanitized=undefined and I keep seeing this​:

pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null

Here is the errant line​: a call to Copy() within PP()​:

  if (UNLIKELY(items - 1 > AvMAX(av))) {
  SV **ary = AvALLOC(av);
  Renew(ary, items, SV*);
  AvMAX(av) = items - 1;
  AvALLOC(av) = ary;
  AvARRAY(av) = ary;
  }

  Copy(MARK+1,AvARRAY(av),items,SV*); /* <<<<<<<<<<<<<<<<<<<<< */
  AvFILLp(av) = items - 1;
  }

Perl Info

Flags:
    category=core
    severity=medium

Site configuration information for perl 5.26.1:

Configured by njh at Wed Sep 27 17:47:22 EDT 2017.

Summary of my perl5 (revision 5 version 26 subversion 1) configuration:
   
  Platform:
    osname=linux
    osvers=4.12.0-2-amd64
    archname=x86_64-linux-thread-multi
    uname='linux microcenter 4.12.0-2-amd64 #1 smp debian 4.12.13-1 (2017-09-19) x86_64 gnulinux '
    config_args='-de -Dprefix=/home/njh/perl5/perlbrew/perls/perl-5.26.1-sanitize-undefined -Duseithreads -Dusedevel -Accflags=-fsanitize=undefined -g -O2 -lubsan -Acc=gcc-7 -Aldflags=-fsanitize=undefined -g -lubsan -Alddlflags=-shared -O2 -L/usr/local/lib -fstack-protector-strong -fsanitize=undefined -g -lubsan -Aeval:scriptdir=/home/njh/perl5/perlbrew/perls/perl-5.26.1-sanitize-undefined/bin'
    hint=recommended
    useposix=true
    d_sigaction=define
    useithreads=define
    usemultiplicity=define
    use64bitint=define
    use64bitall=define
    uselongdouble=undef
    usemymalloc=n
    default_inc_excludes_dot=define
    bincompat5005=undef
  Compiler:
    cc=' gcc-7'
    ccflags ='-D_REENTRANT -D_GNU_SOURCE -fsanitize=undefined -g -O2 -lubsan -fno-strict-aliasing -pipe -fstack-protector-strong -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_FORTIFY_SOURCE=2'
    optimize='-O2'
    cppflags='-D_REENTRANT -D_GNU_SOURCE -fsanitize=undefined -g -O2 -lubsan -fno-strict-aliasing -pipe -fstack-protector-strong -I/usr/local/include'
    ccversion=''
    gccversion='7.2.0'
    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=' gcc-7'
    ldflags =' -fsanitize=undefined -g -lubsan -fstack-protector-strong -L/usr/local/lib'
    libpth=/usr/local/lib /usr/lib/gcc/x86_64-linux-gnu/7/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=-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 -O2 -L/usr/local/lib -fstack-protector-strong -fsanitize=undefined -g -lubsan'



@INC for perl 5.26.1:
    /home/njh/perl5/perlbrew/perls/perl-5.26.1-sanitize-undefined/lib/site_perl/5.26.1/x86_64-linux-thread-multi
    /home/njh/perl5/perlbrew/perls/perl-5.26.1-sanitize-undefined/lib/site_perl/5.26.1
    /home/njh/perl5/perlbrew/perls/perl-5.26.1-sanitize-undefined/lib/5.26.1/x86_64-linux-thread-multi
    /home/njh/perl5/perlbrew/perls/perl-5.26.1-sanitize-undefined/lib/5.26.1


Environment for perl 5.26.1:
    HOME=/home/njh
    LANG=en_GB.UTF-8
    LANGUAGE (unset)
    LD_LIBRARY_PATH=/usr/local/lib::
    LOGDIR (unset)
    PATH=/home/njh/perl5/perlbrew/bin:/home/njh/perl5/perlbrew/perls/perl-5.26.1-sanitize-undefined/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games:/home/njh/bin:/sbin
    PERLBREW_BASHRC_VERSION=0.80
    PERLBREW_HOME=/home/njh/.perlbrew
    PERLBREW_MANPATH=/home/njh/perl5/perlbrew/perls/perl-5.26.1-sanitize-undefined/man
    PERLBREW_PATH=/home/njh/perl5/perlbrew/bin:/home/njh/perl5/perlbrew/perls/perl-5.26.1-sanitize-undefined/bin
    PERLBREW_PERL=perl-5.26.1-sanitize-undefined
    PERLBREW_ROOT=/home/njh/perl5/perlbrew
    PERLBREW_VERSION=0.80
    PERL_BADLANG (unset)
    SHELL=/bin/bash

@p5pRT
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@p5pRT p5pRT commented Sep 28, 2017

From @jkeenan

On Thu, 28 Sep 2017 12​:21​:21 GMT, njh@​bandsman.co.uk wrote​:

This is a bug report for perl from njh@​bandsman.co.uk,
generated with the help of perlbug 1.40 running under perl 5.26.1.

-----------------------------------------------------------------
I've built a Perl5.26.1 with -fsanitized=undefined and I keep seeing
this​:

pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1,
which is declared to never be null

Here is the errant line​: a call to Copy() within PP()​:

if (UNLIKELY(items - 1 > AvMAX(av))) {
SV **ary = AvALLOC(av);
Renew(ary, items, SV*);
AvMAX(av) = items - 1;
AvALLOC(av) = ary;
AvARRAY(av) = ary;
}

Copy(MARK+1,AvARRAY(av),items,SV*); /* <<<<<<<<<<<<<<<<<<<<< */
AvFILLp(av) = items - 1;
}

1. This part of the codebase has been modified in the 5.27.* development series. (See commit f14cf36 (Tony Cook 2017-08-14).) Could you re-try this on perl 5 blead?

2. In order to reproduce a problem showing up during 'make', we first look at the config_args reported in the 'perl -V' data in the ticket. Yours reads​:

config_args='-de -Dprefix=/home/njh/perl5/perlbrew/perls/perl-
5.26.1-sanitize-undefined -Duseithreads -Dusedevel -Accflags=-
fsanitize=undefined -g -O2 -lubsan -Acc=gcc-7 -Aldflags=-
fsanitize=undefined -g -lubsan -Alddlflags=-shared -O2
-L/usr/local/lib -fstack-protector-strong -fsanitize=undefined -g
-lubsan -Aeval​:scriptdir=/home/njh/perl5/perlbrew/perls/perl-5.26.1-
sanitize-undefined/bin'

This is not the easiest data to work with because several of your configuration switches appear more than once​:

#####
-g => 3
-lubsan => 3
-O2 => 2
-Acc=gcc-7 => 1
-Accflags=-fsanitize=undefined => 1
-Aeval​:scriptdir=/home/njh/perl5/perlbrew/perls/perl-5.26.1-sanitize-undefined/bin => 1
-Alddlflags=-shared => 1
-Aldflags=-fsanitize=undefined => 1
-Dprefix=/home/njh/perl5/perlbrew/perls/perl-5.26.1-sanitize-undefined => 1
-Dusedevel => 1
-Duseithreads => 1
-L/usr/local/lib => 1
-de => 1
-fsanitize=undefined => 1
-fstack-protector-strong => 1
#####

Someone attempting to reproduce your problem doesn't necessarily know what all the config args mean, nor whether or not they can appear more than once. Can the duplicates for the first 3 args listed above be cleaned up?

3. When analyzing a problem which shows up during 'make', it's often helpful to proceed by configuring with the smallest possible set of config_args that reproduces the problem. I configured perl 5 blead (commit ad3af58) as follows​:

#####
$> sh ./Configure -des -Dusedevel -Accflags=-fsanitize=undefined -Aldflags=-fsanitize=undefined
#####

I then ran 'make test_harness'. I got two test failures and plenty of compilation warnings.

#####
$ ./perl -Ilib t/run/fresh_perl.t
1..92
ok 1 - $a = "​:="; @​_ = split /($a)/o, "a​:=b​:=c"; print "@​...
not ok 2 - $cusp = ~0 ^ (~0 >> 1);
# Failed test 2 - $cusp = ~0 ^ (~0 >> 1); at ./test.pl line 1059
# got "pp.c​:2717​:7​: runtime error​: signed integer overflow​: -9223372036854775808 - 1 cannot be represented in type \'long int\'\npp.c​:2815​:2​: runtime error​: negation of -9223372036854775808 cannot be represented in type \'long int\'; cast to an unsigned type to negate this value to itself\n7 0 0 8 !"
# expected "7 0 0 8 !"
# PROG​:
# $cusp = ~0 ^ (~0 >> 1);
# use integer;
# $, = " ";
# print +($cusp - 1) % 8, $cusp % 8, -$cusp % 8, 8 | (($cusp + 1) % 8 + 7), "!\n";
# STATUS​: 0
ok 3 - $foo=undef; $foo->go;
...
$ ./perl -Ilib t/run/switchd.t
1..21
ok 1 - Got debugging output​: 1
...
ok 19 - -d does not conflict with sort optimisations
not ok 20 - $DB​::single set to overload
# Failed test 20 - $DB​::single set to overload at t/run/switchd.t line 290
# got "pp.c​:2631​:7​: runtime error​: signed integer overflow​: 9999999999 * 10000000000 cannot be represented in type \'long int\'\ndebugged\n"
# expected "debugged\n"
ok 21 - putenv does not interfere with PERL5OPT parsing
#####
pp.c​:2717​:7​: runtime error​: signed integer overflow​: -9223372036854775808 - 1 cannot be represented in type 'long int'
pp.c​:2631​:7​: runtime error​: signed integer overflow​: 9999999999 * 10000000000 cannot be represented in type 'long int'
pp.c​:2631​:7​: runtime error​: signed integer overflow​: 9999999999 * 10000000000 cannot be represented in type 'long int'
...
# Testing for subsecond file timestamps (mtime) in /home/jkeenan/gitwork/perl/dist/Time-HiRes
# Subsecond file timestamps in /home/jkeenan/gitwork/perl/dist/Time-HiRes​: OK
pp.c​:2717​:7​: runtime error​: signed integer overflow​: -9223372036854775808 - 1 cannot be represented in type 'long int'
pp.c​:2815​:2​: runtime error​: negation of -9223372036854775808 cannot be represented in type 'long int'; cast to an unsigned type to negate this value to itself
pp.c​:2706​:7​: runtime error​: signed integer overflow​: 9223372036854775807 + 1 cannot be represented in type 'long int'
pp.c​:2650​:17​: runtime error​: negation of -9223372036854775808 cannot be represented in type 'long int'; cast to an unsigned type to negate this value to itself
#####

Could you configure and build perl with gcc-7 with the shorter list of config_args above?

Thank you very much.

--
James E Keenan (jkeenan@​cpan.org)

@p5pRT
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@p5pRT p5pRT commented Sep 28, 2017

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

@p5pRT
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@p5pRT p5pRT commented Sep 30, 2017

From @nigelhorne

James​:

Thank you for your reply.

#####
  $> sh ./Configure -des -Dusedevel -Accflags=-fsanitize=undefined -Aldflags=-fsanitize=undefined
  #####

I have done the same on 5.26.1 and run ‘make test_harness’. The output is very large. I’ll attach it to the on-line ticket on RT.

-Nigel
 

@p5pRT
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@p5pRT p5pRT commented Sep 30, 2017

From @nigelhorne

Well that didn’t work either – it bounced that the file was too big. If you need the output of make test_harness can you give me a way to send it to you?

-Nigel

On 30/9/17, 10​:50, "Nigel Horne" <njh@​bandsman.co.uk> wrote​:

  Looks like there is no way to attach a file to the ticket!
 
  I’m therefore going to attach to this e-mail.
 
  -Nigel
 
  On 30/9/17, 10​:35, "Nigel Horne" <njh@​bandsman.co.uk> wrote​:
 
  James​:
 
  Thank you for your reply.
 
  #####
  $> sh ./Configure -des -Dusedevel -Accflags=-fsanitize=undefined -Aldflags=-fsanitize=undefined
  #####
 
  I have done the same on 5.26.1 and run ‘make test_harness’. The output is very large. I’ll attach it to the on-line ticket on RT.
 
  -Nigel
 
 
 
 

@p5pRT
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@p5pRT p5pRT commented Sep 30, 2017

From @jkeenan

On Sat, 30 Sep 2017 14​:56​:27 GMT, njh@​bandsman.co.uk wrote​:

Well that didn’t work either – it bounced that the file was too big.
If you need the output of make test_harness can you give me a way to
send it to you?

-Nigel

On 30/9/17, 10​:50, "Nigel Horne" <njh@​bandsman.co.uk> wrote​:

Looks like there is no way to attach a file to the ticket!

I’m therefore going to attach to this e-mail.

-Nigel

On 30/9/17, 10​:35, "Nigel Horne" <njh@​bandsman.co.uk> wrote​:

James​:

Thank you for your reply.

#####
$> sh ./Configure -des -Dusedevel -Accflags=-fsanitize=undefined
-Aldflags=-fsanitize=undefined
#####

I have done the same on 5.26.1 and run ‘make test_harness’. The
output is very large. I’ll attach it to the on-line ticket on RT.

-Nigel

1. Here is my current hypothesis. There *are* problems when you configure with​:

#####
'Accflags=-fsanitize=undefined -Aldflags=-fsanitize=undefined'
#####

... in *both* perl-5.26.1 and perl 5 blead (e.g., commit 582a8ad). However, the problems are much *fewer* in blead (perhaps as a result of the earlier cited commit f14cf36 (Tony Cook 2017-08-14)).

I checked out the 'v5.26.1' tag into a local branch, then configured and built as follows​:

#####
sh ./Configure -des -Dusedevel -Accflags=-fsanitize=undefined -Aldflags=-fsanitize=undefined && make test_prep
#####

I didn't record the output of 'make test_prep', but it was visibly littered with compilation warnings like this​:

#####
pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null
/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null
#####

I then ran this command to capture the output (attached) of two test files​:

#####
cd t;./perl harness -v run/fresh_perl.t run/switchd.t 2>&1 | tee /tmp/132177-5.26.1-sanitize-undefined-output.txt; cd -
#####

I then cleaned my checkout directory, checked out blead, configured and built as above -- and this time 'make test_prep' output appeared to be quite compilation-warning free. I then ran those two test files and captured their output (attached) at this commit

#####
cd t;./perl harness -v run/fresh_perl.t run/switchd.t 2>&1 | tee /tmp/132177-582a8ad9-sanitize-undefined-output.txt; cd -
#####

As you can see, I had test failures at both 5.26.1 and at blead -- but far fewer test failures at blead and far fewer C-level warnings during the tests at blead.

2. The above was run with gcc version 5.4.0. You are running (I think) with gcc 7.2.0. We know from smoke test reports (e.g., http​://perl5.test-smoke.org/report/58240) and discussion on #p5p that gcc 7.2.* throws a ton of compilation warnings for which we have not previously accounted. So let's temporarily set aside the compilation warnings you're getting during 'make test_prep' and just focus on the FAILs in the tests. I recommend that for each of 5.26.1 and perl 5 blead, you​:

a. Configure and build perl with the sanitize undefined switches as above;

b. Run 'make test' (or 'make test_harness') for the purpose of identifying FAILing test files;

c. Then run just capture and attach the output of *only* the failing test files.

Those two files should be small enough to be attachable.

Thank you very much.

--
James E Keenan (jkeenan@​cpan.org)

@p5pRT
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@p5pRT p5pRT commented Sep 30, 2017

From @jkeenan

pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null
/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null
pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null
/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null
pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null
/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null
pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null
/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null
# Failed test 2 - $cusp = 0 ^ (0 >> 1); at ./test.pl line 1059
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null\npp.c​:2828​:7​: runtime error​: signed integer overflow​: -9223372036854775808 - 1 cannot be represented in type \'long int\'\npp.c​:2926​:2​: runtime error​: negation of -9223372036854775808 cannot be represented in type \'long int\'; cast to an unsigned type to negate this value to itself\n7 0 0 8 !"
# expected "7 0 0 8 !"
# PROG​:
# $cusp = 0 ^ (0 >> 1);
# use integer;
# $, = " ";
# print +($cusp - 1) % 8, $cusp % 8, -$cusp % 8, 8 | (($cusp + 1) % 8 + 7), "!\n";
# STATUS​: 0
pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null
/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null
pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null
/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null
# Failed test 4 - BEGIN at ./test.pl line 1059
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null"
# expected ""
# PROG​:
# BEGIN
# {
# "foo";
# }
# STATUS​: 0
pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null
/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null
pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null
/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null
pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null
/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null
pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null
/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null
pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null
/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null
# Failed test 9 - No crash when *DB​::DB exists but not &DB​::DB at run/switchd.t line 131
# got 'pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null\nNo DB​::DB routine defined at -e line 1.\n'
# expected /(?^​:^No DB​::DB routine defined)/
# Failed test 10 - No crash when &DB​::DB exists but isn't actually defined at run/switchd.t line 140
# got 'pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null\nNo DB​::DB routine defined at -e line 1.\n'
# expected /(?^​:^No DB​::DB routine defined)/
# Failed test 11 - DB​::DB works after '*DB​::DB if 0' at run/switchd.t line 150
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null\nok\n"
# expected "ok\n"
pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null
/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null
# Failed test 15 - DB​::goto at run/switchd.t line 215
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null\ngoto<main​::baz>;hello;\n"
# expected "goto<main​::baz>;hello;\n"
pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null
/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null
# Failed test 18 - package FOO;sub new {bless {FOO => BAR}}; at ./test.pl line 1059
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null\nBAR"
# expected "BAR"
# PROG​:
# package FOO;sub new {bless {FOO => BAR}};
# package main;
# use strict vars;
# my $self = new FOO;
# print $$self{FOO};
# STATUS​: 0
# Failed test 17 - setting breakpoints without *DB​::dbline aliased at run/switchd.t line 236
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null\nok\n"
# expected "ok\n"
# Failed test 18 - UTF8 length caches on $DB​::sub are flushed at run/switchd.t line 258
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n42\n"
# expected "42\n"
pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null
/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null
# Failed test 24 - BEGIN { die "phooey\n" } at ./test.pl line 1059
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null\nphooey\nBEGIN failed--compilation aborted at - line 1."
# expected "phooey\nBEGIN failed--compilation aborted at - line 1."
# PROG​:
# BEGIN { die "phooey\n" }
# STATUS​: 6400
# Failed test 25 - BEGIN { 1/$zero } at ./test.pl line 1059
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null\nIllegal division by zero at - line 1.\nBEGIN failed--compilation aborted at - line 1."
# expected "Illegal division by zero at - line 1.\nBEGIN failed--compilation aborted at - line 1."
# PROG​:
# BEGIN { 1/$zero }
# STATUS​: 6400
# Failed test 26 - BEGIN { undef = 0 } at ./test.pl line 1059
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null\nModification of a read-only value attempted at - line 1.\nBEGIN failed--compilation aborted at - line 1."
# expected "Modification of a read-only value attempted at - line 1.\nBEGIN failed--compilation aborted at - line 1."
# PROG​:
# BEGIN { undef = 0 }
# STATUS​: 6400
# Failed test 29 - \# used to attach defelem magic to all immortal val... at ./test.pl line 1059
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null\nok"
# expected "ok"
# PROG​:
# used to attach defelem magic to all immortal values,
# which made restore of local $_ fail.
# foo(2>1);
# sub foo { bar() for @​_; }
# sub bar { local $_; }
# print "ok\n";
# STATUS​: 0
# Failed test 34 - sub thing { 0 || return qw(now is the time) } at ./test.pl line 1059
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null\nnowisthetime"
# expected "nowisthetime"
# PROG​:
# sub thing { 0 || return qw(now is the time) }
# print thing(), "\n";
# STATUS​: 0
# Failed test 37 - package p; at ./test.pl line 1059
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null\nreally groovy"
# expected "really groovy"
# PROG​:
# package p;
# sub func { print 'really ' unless wantarray; 'p' }
# sub groovy { 'groovy' }
# package main;
# print p​::func()->groovy(), "\n"
# STATUS​: 0
# Failed test 41 - $| = 1; at ./test.pl line 1059
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null\nIn foo1\nSubroutine foo redefined at (eval 1) line 1.\nExiting foo1\nIn foo2"
# expected "In foo1\nSubroutine foo redefined at (eval 1) line 1.\nExiting foo1\nIn foo2"
# PROG​:
# $| = 1;
# sub foo {
# print "In foo1\n";
# eval 'sub foo { print "In foo2\n" }';
# print "Exiting foo1\n";
# }
# foo;
# foo;
# STATUS​: 0
# Failed test 20 - $DB​::single set to overload at run/switchd.t line 290
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null\npp.c​:2742​:7​: runtime error​: signed integer overflow​: 9999999999 * 10000000000 cannot be represented in type \'long int\'\ndebugged\n"
# expected "debugged\n"
pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null
/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null
run/switchd.t .....
1..21
ok 1 - Got debugging output​: 1
ok 2 - Got debugging output​: 2
ok 3 - Got debugging output​: 3
ok 4 - The debugger can see the lines of the main program under \#!perl -d
ok 5 - \#!perl -d​:whatever does not throw line numbers off
ok 6 - Subroutine redefinition works in the debugger [perl \#48332]
ok 7 - Subroutines no longer found under their names can be called
ok 8 - No crash when calling orphaned subroutine via goto &
not ok 9 - No crash when *DB​::DB exists but not &DB​::DB
not ok 10 - No crash when &DB​::DB exists but isn't actually defined
not ok 11 - DB​::DB works after '*DB​::DB if 0'
ok 12 - Recursive DB​::DB does not clobber its own pad
ok 13 - Copy on write does not mangle ${"_<-e"}[0] [perl \#118627]
ok 14 - PERL5DB with embedded newlines
not ok 15 - DB​::goto
ok 16 - %DB​::lsub is not vivified
not ok 17 - setting breakpoints without *DB​::dbline aliased
not ok 18 - UTF8 length caches on $DB​::sub are flushed
ok 19 - -d does not conflict with sort optimisations
not ok 20 - $DB​::single set to overload
ok 21 - putenv does not interfere with PERL5OPT parsing
Failed 7/21 subtests
# Failed test 46 - BEGIN { @​ARGV = qw(a b c d e) } at ./test.pl line 1059
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null\nargv <a b c d e>\nbegin <a>\ncheck <b>\ninit <c>\nend <d>\nargv <e>"
# expected "argv <a b c d e>\nbegin <a>\ncheck <b>\ninit <c>\nend <d>\nargv <e>"
# PROG​:
# BEGIN { @​ARGV = qw(a b c d e) }
# BEGIN { print "argv <@​ARGV>\nbegin <",shift,">\n" }
# END { print "end <",shift,">\nargv <@​ARGV>\n" }
# INIT { print "init <",shift,">\n" }
# CHECK { print "check <",shift,">\n" }
# STATUS​: 0
# Failed test 54 - BEGIN { at ./test.pl line 1059
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null\nfoo\nbar\nBEGIN failed--compilation aborted at - line 8."
# expected "foo\nbar\nBEGIN failed--compilation aborted at - line 8."
# PROG​:
# BEGIN {
# $| = 1;
# $SIG{__WARN__} = sub {
# eval { print $_[0] };
# die "bar\n";
# };
# warn "foo\n";
# }
# STATUS​: 6400
# Failed test 56 - re(); at ./test.pl line 1059
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null"
# expected ""
# PROG​:
# re();
# sub re {
# my $re = join '', eval 'qr/(??{ $obj->method })/';
# $re;
# }
# STATUS​: 0
# Failed test 57 - use strict; at ./test.pl line 1059
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null\nZZZ"
# expected "ZZZ"
# PROG​:
# use strict;
# my $foo = "ZZZ\n";
# END { print $foo }
# STATUS​: 0
# Failed test 58 - eval ' at ./test.pl line 1059
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null\nZZZ"
# expected "ZZZ"
# PROG​:
# eval '
# use strict;
# my $foo = "ZZZ\n";
# END { print $foo }
# ';
# STATUS​: 0
# Failed test 60 - $x = sub {}; at ./test.pl line 1059
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null\nok"
# expected "ok"
# PROG​:
# $x = sub {};
# foo();
# sub foo { eval { return }; }
# print "ok\n";
# STATUS​: 0
# Failed test 62 - sub f { my $a = 1; my $b = 2; my $c = 3; my $d = 4... at ./test.pl line 1059
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null\nfoo"
# expected "foo"
# PROG​:
# sub f { my $a = 1; my $b = 2; my $c = 3; my $d = 4; next }
# my $x = "foo";
# { f } continue { print $x, "\n" }
# STATUS​: 0
# Failed test 65 - \# lexicals declared after the myeval() definition ... at ./test.pl line 1059
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null\nok 1\nok 2"
# expected "ok 1\nok 2"
# PROG​:
# lexicals declared after the myeval() definition should not be visible
# within it
# sub myeval { eval $_[0] }
# my $foo = "ok 2\n";
# myeval('sub foo { local $foo = "ok 1\n"; print $foo; }');
# die $@​ if $@​;
# foo();
# print $foo;
# STATUS​: 0
# Failed test 66 - \# lexicals outside an eval"" should be visible ins... at ./test.pl line 1059
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null\nok"
# expected "ok"
# PROG​:
# lexicals outside an eval"" should be visible inside subroutine definitions
# within it
# eval <<'EOT'; die $@​ if $@​;
# {
# my $X = "ok\n";
# eval 'sub Y { print $X }'; die $@​ if $@​;
# Y();
# }
# EOT
# STATUS​: 0
# Failed test 71 - \# Vadim Konovalov at ./test.pl line 1059
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null"
# expected ""
# PROG​:
# Vadim Konovalov
# use strict;
# sub new_pmop($) {
# my $pm = shift;
# return eval "sub {shift=
/$pm/}";
# }
# new_pmop "abcdef"; reset;
# new_pmop "abcdef"; reset;
# new_pmop "abcdef"; reset;
# new_pmop "abcdef"; reset;
# STATUS​: 0
# Failed test 76 - my $foo = Bar->new(); at ./test.pl line 1059
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null\nBar=ARRAY(0x...)"
# expected "Bar=ARRAY(0x...)"
# PROG​:
# my $foo = Bar->new();
# my @​dst;
# END {
# ($_ = "@​dst") =
s/\(0x.+?\)/(0x...)/;
# print $_, "\n";
# }
# package Bar;
# sub new {
# my Bar $self = bless [], Bar;
# eval '$self';
# return $self;
# }
# sub DESTROY {
# push @​dst, "$_[0]";
# }
# STATUS​: 0
# Failed test 77 - (?{...}) compilation bounces on PL_rs at ./test.pl line 1059
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null\nok"
# expected "ok"
# PROG​:
# {
# /(?{ $x })/;
# # {
# }
# BEGIN { print "ok\n" }
# STATUS​: 0
# Failed test 81 - example from Camel 5, ch. 15, pp.406 (with my) at ./test.pl line 1059
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n3"
# expected "3"
# PROG​:
# SKIP​: ord "A" == 193 # EBCDIC
# use strict;
# use utf8;
# my $人 = 2; # 0xe4 0xba 0xba​: U+4eba, "human" in CJK ideograph
# $人++; # a child is born
# print $人, "\n";
# STATUS​: 0
# Failed test 82 - example from Camel 5, ch. 15, pp.406 (with our) at ./test.pl line 1059
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n3"
# expected "3"
# PROG​:
# SKIP​: ord "A" == 193 # EBCDIC
# use strict;
# use utf8;
# our $人 = 2; # 0xe4 0xba 0xba​: U+4eba, "human" in CJK ideograph
# $人++; # a child is born
# print $人, "\n";
# STATUS​: 0
# Failed test 83 - example from Camel 5, ch. 15, pp.406 (with package vars) at ./test.pl line 1059
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n3"
# expected "3"
# PROG​:
# SKIP​: ord "A" == 193 # EBCDIC
# use utf8;
# $人 = 2; # 0xe4 0xba 0xba​: U+4eba, "human" in CJK ideograph
# $人++; # a child is born
# print $人, "\n";
# STATUS​: 0
# Failed test 84 - example from Camel 5, ch. 15, pp.406 (with use vars) at ./test.pl line 1059
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n3"
# expected "3"
# PROG​:
# SKIP​: ord "A" == 193 # EBCDIC
# use strict;
# use utf8;
# use vars qw($人);
# $人 = 2; # 0xe4 0xba 0xba​: U+4eba, "human" in CJK ideograph
# $人++; # a child is born
# print $人, "\n";
# STATUS​: 0
# Failed test 85 - \# test that closures generated by eval"" hold on t... at ./test.pl line 1059
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null\nok 1"
# expected "ok 1"
# PROG​:
# test that closures generated by eval"" hold on to the CV of the eval""
# for their entire lifetime
# $code = eval q[
# sub { eval '$x = "ok 1\n"'; }
# ];
# &{$code}();
# print $x;
# STATUS​: 0
# Failed test 88 - [perl \#20667] unicode regex vs non-unicode regex at ./test.pl line 1059
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null\nIt\'s good! >A< >B<"
# expected "It\'s good! >A< >B<"
# PROG​:
# SKIP​: !defined &DynaLoader​::boot_DynaLoader && !eval 'require "unicore/Heavy.pl"'
# (skip under miniperl if Unicode tables are not built yet)
# $toto = 'Hello';
# $toto =
/\w/; # this line provokes the problem!
# $name = 'A B';
# utf8​::upgrade($name) if @​ARGV;
# if ($name =
/(\p{IsUpper}) (\p{IsUpper})/){
# print "It's good! >$1< >$2<\n";
# } else {
# print "It's not good...\n";
# }
# STATUS​: 0
# Failed test 90 - "\#75146​: 27e9045 (fix for \#23810) introduces a \#regression" at ./test.pl line 1059
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null\nIf you get here, you didn\'t crash"
# expected "If you get here, you didn\'t crash"
# PROG​:
# use strict;
#
# unshift @​INC, sub {
# my ($self, $fn) = @​_;
#
# (my $pkg = $fn) =~ s{/}{​::}g;
# $pkg =~ s{.pm$}{};
#
# if ($pkg eq 'Credit') {
# my $code = <<'EOC';
# package Credit;
#
# use NonsenseAndBalderdash;
#
# 1;
# EOC
# eval $code;
# die "\$@​ is $@​";
# }
#
# #print STDERR "Generator​: not one of mine, ignoring\n";
# return undef;
# };
#
# create load-on-demand new() constructors
# {
# package Credit;
# sub new {
# eval "use Credit";
# }
# };
#
# eval {
# my $credit = new Credit;
# };
#
# print "If you get here, you didn't crash\n";
# STATUS​: 0
# Failed test 91 - [perl \#112312] crash on syntax error at ./test.pl line 1059
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null\nsyntax error at - line 12, near \"used\"\nsyntax error at - line 12, near \"used}\"\nUnmatched right curly bracket at - line 14, at end of line\nExecution of - aborted due to compilation errors."
# expected "syntax error at - line 12, near \"used\"\nsyntax error at - line 12, near \"used}\"\nUnmatched right curly bracket at - line 14, at end of line\nExecution of - aborted due to compilation errors."
# PROG​:
# SKIP​: !defined &DynaLoader​::boot_DynaLoader # miniperl
#!/usr/bin/perl
# use strict;
# use warnings;
# sub meow (&);
# my %h;
# my $k;
# meow {
# my $t : need_this;
# $t = {
# size => $h{$k}{size};
# used => $h{$k}(used}
# };
# };
# STATUS​: 65280
# Failed test 92 - [perl \#112312] crash on syntax error - another test at ./test.pl line 1059
# got "pp_hot.c​:4143​:6​: runtime error​: null pointer passed as argument 1, which is declared to never be null\n/usr/include/x86_64-linux-gnu/bits/string3.h​:53​:10​: runtime error​: null pointer passed as argument 1, which is declared to never be null\nsyntax error at - line 15, near \"used\"\nsyntax error at - line 15, near \"used}\"\nUnmatched right curly bracket at - line 17, at end of line\nExecution of - aborted due to compilation errors."
# expected "syntax error at - line 15, near \"used\"\nsyntax error at - line 15, near \"used}\"\nUnmatched right curly bracket at - line 17, at end of line\nExecution of - aborted due to compilation errors."
# PROG​:
# SKIP​: !defined &DynaLoader​::boot_DynaLoader # miniperl
#!/usr/bin/perl
# use strict;
# use warnings;
#
# sub meow (&);
#
# my %h;
# my $k;
#
# meow {
# my $t : need_this;
# $t = {
# size => $h{$k}{size};
# used => $h{$k}(used}
# };
# };
#
# sub testo {
# my $value = shift;
# print;
# print;
# print;
# 1;
# }
# STATUS​: 65280
run/fresh_perl.t ..
1..92
ok 1 - $a = "​:="; @​_ = split /($a)/o, "a​:=b​:=c"; print "@​...
not ok 2 - $cusp = 0 ^ (0 >> 1);
ok 3 - $foo=undef; $foo->go;
not ok 4 - BEGIN
ok 5 - $array[128]=1
ok 6 - $x=0x0eabcd; print $x->ref;
ok 7 - chop ($str .= <DATA>);
ok 8 - close ($banana);
ok 9 - $x=2;$y=3;$x<$y ? $x : $y += 23;print $x;
ok 10 - eval 'sub bar {print "In bar"}';
ok 11 - system './perl -ne "print if eof" /dev/null'
ok 12 - chop($file = <DATA>);
ok 13 - package N;
ok 14 - $_="foo";
ok 15 - push(@​a, 1, 2, 3,)
ok 16 - quotemeta ""
ok 17 - for ("ABCDE") {
not ok 18 - package FOO;sub new {bless {FOO => BAR}};
ok 19 - $_="foo";
ok 20 - print scalar ("foo","bar")
ok 21 - sub by_number { $a <=> $b; };\# inline function for...
ok 22 - sub NewShell
ok 23 - {
not ok 24 - BEGIN { die "phooey\n" }
not ok 25 - BEGIN { 1/$zero }
not ok 26 - BEGIN { undef = 0 }
ok 27 - {
ok 28 - my @​a; $a[2] = 1; for (@​a) { $_ = 2 } print "@​a\n"
not ok 29 - \# used to attach defelem magic to all immortal val...
ok 30 - @​a = ($a, $b, $c, $d) = (5, 6);
ok 31 - print "ok\n" if (1E2<<1 == 200 and 3E4<<3 == 24000...
ok 32 - print "ok\n" if ("\0" lt "\xFF");
ok 33 - open(H,'run/fresh_perl.t'); \# must be in the 't' d...
not ok 34 - sub thing { 0 || return qw(now is the time) }
ok 35 - $ren = 'joy';
ok 36 - $stimpy = 'happy';
not ok 37 - package p;
ok 38 - @​list = ([ 'one', 1 ], [ 'two', 2 ]);
ok 39 - ($k, $s) = qw(x 0);
ok 40 - my $a = 'outer';
not ok 41 - $| = 1;
ok 42 - $s = 0;
ok 43 - sub foo { local $_ = shift; @​_ = split; @​_ }
ok 44 - "A" =
/(?{"{"})/ \# Check it outside of eval too
ok 45 - /(?{"{"}})/ \# Check it outside of eval too
not ok 46 - BEGIN { @​ARGV = qw(a b c d e) }
ok 47 - \# fdopen from a system descriptor to a system desc...
ok 48 - sub testme { my $a = "test"; { local $a = "new tes...
ok 49 - package X;
ok 50 - package X;
ok 51 - package X;
ok 52 - package X;
ok 53 - package X;
not ok 54 - BEGIN {
ok 55 - package X;
not ok 56 - re();
not ok 57 - use strict;
not ok 58 - eval '
ok 59 - if (@​ARGV) { print "" }
not ok 60 - $x = sub {};
ok 61 - \# moved to op/lc.t
not ok 62 - sub f { my $a = 1; my $b = 2; my $c = 3; my $d = 4...
ok 63 - \# [perl \#3066]
ok 64 - print qw(ab a\b a\\b);
not ok 65 - \# lexicals declared after the myeval() definition ...
not ok 66 - \# lexicals outside an eval"" should be visible ins...
ok 67 - \# [ID 20001202.002 (\#4821)] and change \#8066 added...
ok 68 - \# 20001210.003 (\#4893) mjd@​plover.com
ok 69 - \# Inaba Hiroto
ok 70 - \# Nicholas Clark
not ok 71 - \# Vadim Konovalov
ok 72 - \# David Dyck
ok 73 - \# core dump in 20000716.007 (\#3516)
ok 74 - \# Bug 20010515.004 (\#6998)
ok 75 - \# Bug 20010506.041 (\#6952)
not ok 76 - my $foo = Bar->new();
not ok 77 - (?{...}) compilation bounces on PL_rs
ok 78 - scalar ref to file test operator segfaults on 5.6.1 [ID 20011127.155 (\#7947)]
ok 79 - [ID 20011128.159 (\#7951)] 'X' =
/\X/ segfault in 5.6.1
ok 80 - segfault in 5.6.1 within peep()
not ok 81 - example from Camel 5, ch. 15, pp.406 (with my)
not ok 82 - example from Camel 5, ch. 15, pp.406 (with our)
not ok 83 - example from Camel 5, ch. 15, pp.406 (with package vars)
not ok 84 - example from Camel 5, ch. 15, pp.406 (with use vars)
not ok 85 - \# test that closures generated by eval"" hold on t...
ok 86 - [ID 20020623.009 (\#9728)] nested eval/sub segfaults
ok 87 - [perl \#17951] Strange UTF error
not ok 88 - [perl \#20667] unicode regex vs non-unicode regex
ok 89 - [perl \#8760] strangeness with utf8 and warn
not ok 90 - "\#75146​: 27e9045 (fix for \#23810) introduces a \#regression"
not ok 91 - [perl \#112312] crash on syntax error
not ok 92 - [perl \#112312] crash on syntax error - another test
Failed 31/92 subtests

Test Summary Report


run/switchd.t (Wstat​: 0 Tests​: 21 Failed​: 7)
  Failed tests​: 9-11, 15, 17-18, 20
run/fresh_perl.t (Wstat​: 0 Tests​: 92 Failed​: 31)
  Failed tests​: 2, 4, 18, 24-26, 29, 34, 37, 41, 46, 54
  56-58, 60, 62, 65-66, 71, 76-77, 81-85
  88, 90-92
Files=2, Tests=113, 1 wallclock secs ( 0.06 usr 0.00 sys + 0.28 cusr 0.04 csys = 0.38 CPU)
Result​: FAIL

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@p5pRT p5pRT commented Sep 30, 2017

From @jkeenan

# Failed test 2 - $cusp = ~0 ^ (~0 >> 1); at ./test.pl line 1059
# got "pp.c​:2717​:7​: runtime error​: signed integer overflow​: -9223372036854775808 - 1 cannot be represented in type \'long int\'\npp.c​:2815​:2​: runtime error​: negation of -9223372036854775808 cannot be represented in type \'long int\'; cast to an unsigned type to negate this value to itself\n7 0 0 8 !"
# expected "7 0 0 8 !"
# PROG​:
# $cusp = ~0 ^ (~0 >> 1);
# use integer;
# $, = " ";
# print +($cusp - 1) % 8, $cusp % 8, -$cusp % 8, 8 | (($cusp + 1) % 8 + 7), "!\n";
# STATUS​: 0
# Failed test 20 - $DB​::single set to overload at run/switchd.t line 290
# got "pp.c​:2631​:7​: runtime error​: signed integer overflow​: 9999999999 * 10000000000 cannot be represented in type \'long int\'\ndebugged\n"
# expected "debugged\n"
run/switchd.t .....
1..21
ok 1 - Got debugging output​: 1
ok 2 - Got debugging output​: 2
ok 3 - Got debugging output​: 3
ok 4 - The debugger can see the lines of the main program under \#!perl -d
ok 5 - \#!perl -d​:whatever does not throw line numbers off
ok 6 - Subroutine redefinition works in the debugger [perl \#48332]
ok 7 - Subroutines no longer found under their names can be called
ok 8 - No crash when calling orphaned subroutine via goto &
ok 9 - No crash when *DB​::DB exists but not &DB​::DB
ok 10 - No crash when &DB​::DB exists but isn't actually defined
ok 11 - DB​::DB works after '*DB​::DB if 0'
ok 12 - Recursive DB​::DB does not clobber its own pad
ok 13 - Copy on write does not mangle ${"_<-e"}[0] [perl \#118627]
ok 14 - PERL5DB with embedded newlines
ok 15 - DB​::goto
ok 16 - %DB​::lsub is not vivified
ok 17 - setting breakpoints without *DB​::dbline aliased
ok 18 - UTF8 length caches on $DB​::sub are flushed
ok 19 - -d does not conflict with sort optimisations
not ok 20 - $DB​::single set to overload
ok 21 - putenv does not interfere with PERL5OPT parsing
Failed 1/21 subtests
run/fresh_perl.t ..
1..92
ok 1 - $a = "​:="; @​_ = split /($a)/o, "a​:=b​:=c"; print "@​...
not ok 2 - $cusp = 0 ^ (0 >> 1);
ok 3 - $foo=undef; $foo->go;
ok 4 - BEGIN
ok 5 - $array[128]=1
ok 6 - $x=0x0eabcd; print $x->ref;
ok 7 - chop ($str .= <DATA>);
ok 8 - close ($banana);
ok 9 - $x=2;$y=3;$x<$y ? $x : $y += 23;print $x;
ok 10 - eval 'sub bar {print "In bar"}';
ok 11 - system './perl -ne "print if eof" /dev/null'
ok 12 - chop($file = <DATA>);
ok 13 - package N;
ok 14 - $_="foo";
ok 15 - push(@​a, 1, 2, 3,)
ok 16 - quotemeta ""
ok 17 - for ("ABCDE") {
ok 18 - package FOO;sub new {bless {FOO => BAR}};
ok 19 - $_="foo";
ok 20 - print scalar ("foo","bar")
ok 21 - sub by_number { $a <=> $b; };\# inline function for...
ok 22 - sub NewShell
ok 23 - {
ok 24 - BEGIN { die "phooey\n" }
ok 25 - BEGIN { 1/$zero }
ok 26 - BEGIN { undef = 0 }
ok 27 - {
ok 28 - my @​a; $a[2] = 1; for (@​a) { $_ = 2 } print "@​a\n"
ok 29 - \# used to attach defelem magic to all immortal val...
ok 30 - @​a = ($a, $b, $c, $d) = (5, 6);
ok 31 - print "ok\n" if (1E2<<1 == 200 and 3E4<<3 == 24000...
ok 32 - print "ok\n" if ("\0" lt "\xFF");
ok 33 - open(H,'run/fresh_perl.t'); \# must be in the 't' d...
ok 34 - sub thing { 0 || return qw(now is the time) }
ok 35 - $ren = 'joy';
ok 36 - $stimpy = 'happy';
ok 37 - package p;
ok 38 - @​list = ([ 'one', 1 ], [ 'two', 2 ]);
ok 39 - ($k, $s) = qw(x 0);
ok 40 - my $a = 'outer';
ok 41 - $| = 1;
ok 42 - $s = 0;
ok 43 - sub foo { local $_ = shift; @​_ = split; @​_ }
ok 44 - "A" =
/(?{"{"})/ \# Check it outside of eval too
ok 45 - /(?{"{"}})/ \# Check it outside of eval too
ok 46 - BEGIN { @​ARGV = qw(a b c d e) }
ok 47 - \# fdopen from a system descriptor to a system desc...
ok 48 - sub testme { my $a = "test"; { local $a = "new tes...
ok 49 - package X;
ok 50 - package X;
ok 51 - package X;
ok 52 - package X;
ok 53 - package X;
ok 54 - BEGIN {
ok 55 - package X;
ok 56 - re();
ok 57 - use strict;
ok 58 - eval '
ok 59 - if (@​ARGV) { print "" }
ok 60 - $x = sub {};
ok 61 - \# moved to op/lc.t
ok 62 - sub f { my $a = 1; my $b = 2; my $c = 3; my $d = 4...
ok 63 - \# [perl \#3066]
ok 64 - print qw(ab a\b a\\b);
ok 65 - \# lexicals declared after the myeval() definition ...
ok 66 - \# lexicals outside an eval"" should be visible ins...
ok 67 - \# [ID 20001202.002 (\#4821)] and change \#8066 added...
ok 68 - \# 20001210.003 (\#4893) mjd@​plover.com
ok 69 - \# Inaba Hiroto
ok 70 - \# Nicholas Clark
ok 71 - \# Vadim Konovalov
ok 72 - \# David Dyck
ok 73 - \# core dump in 20000716.007 (\#3516)
ok 74 - \# Bug 20010515.004 (\#6998)
ok 75 - \# Bug 20010506.041 (\#6952)
ok 76 - my $foo = Bar->new();
ok 77 - (?{...}) compilation bounces on PL_rs
ok 78 - scalar ref to file test operator segfaults on 5.6.1 [ID 20011127.155 (\#7947)]
ok 79 - [ID 20011128.159 (\#7951)] 'X' =
/\X/ segfault in 5.6.1
ok 80 - segfault in 5.6.1 within peep()
ok 81 - example from Camel 5, ch. 15, pp.406 (with my)
ok 82 - example from Camel 5, ch. 15, pp.406 (with our)
ok 83 - example from Camel 5, ch. 15, pp.406 (with package vars)
ok 84 - example from Camel 5, ch. 15, pp.406 (with use vars)
ok 85 - \# test that closures generated by eval"" hold on t...
ok 86 - [ID 20020623.009 (\#9728)] nested eval/sub segfaults
ok 87 - [perl \#17951] Strange UTF error
ok 88 - [perl \#20667] unicode regex vs non-unicode regex
ok 89 - [perl \#8760] strangeness with utf8 and warn
ok 90 - "\#75146​: 27e9045 (fix for \#23810) introduces a \#regression"
ok 91 - [perl \#112312] crash on syntax error
ok 92 - [perl \#112312] crash on syntax error - another test
Failed 1/92 subtests

Test Summary Report


run/switchd.t (Wstat​: 0 Tests​: 21 Failed​: 1)
  Failed test​: 20
run/fresh_perl.t (Wstat​: 0 Tests​: 92 Failed​: 1)
  Failed test​: 2
Files=2, Tests=113, 1 wallclock secs ( 0.05 usr 0.00 sys + 0.19 cusr 0.06 csys = 0.30 CPU)
Result​: FAIL

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@p5pRT p5pRT commented Oct 1, 2017

From @jkeenan

On Sat, 30 Sep 2017 18​:23​:03 GMT, jkeenan wrote​:

#####
cd t;./perl harness -v run/fresh_perl.t run/switchd.t 2>&1 | tee
/tmp/132177-582a8ad9-sanitize-undefined-output.txt; cd -
#####

As you can see, I had test failures at both 5.26.1 and at blead -- but
far fewer test failures at blead and far fewer C-level warnings during
the tests at blead.

I'm attaching a file with the parts of pp.c that are referenced in the test failures I got on blead on linux using gcc-5.4.0 with the "sanitize=undefined" configuration switches.

--
James E Keenan (jkeenan@​cpan.org)

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@p5pRT p5pRT commented Oct 1, 2017

From @jkeenan

t/run/fresh_perl.t

2711 PP(pp_i_subtract)
2712 {
2713 dSP; dATARGET;
2714 tryAMAGICbin_MG(subtr_amg, AMGf_assign);
2715 {
2716 dPOPTOPiirl_ul_nomg;
2717 SETi( left - right );
2718 RETURN;
2719 }
2720 }
...
2807 PP(pp_i_negate)
2808 {
2809 dSP; dTARGET;
2810 tryAMAGICun_MG(neg_amg, 0);
2811 if (S_negate_string(aTHX)) return NORMAL;
2812 {
2813 SV * const sv = TOPs;
2814 IV const i = SvIV_nomg(sv);
2815 SETi(-i);
2816 return NORMAL;
2817 }
2818 }

t/run/switchd.t

2625 PP(pp_i_multiply)
2626 {
2627 dSP; dATARGET;
2628 tryAMAGICbin_MG(mult_amg, AMGf_assign);
2629 {
2630 dPOPTOPiirl_nomg;
2631 SETi( left * right );
2632 RETURN;
2633 }
2634 }

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@p5pRT p5pRT commented Dec 30, 2017

From zefram@fysh.org

The code in question was fixed by commit
f14cf36 in Perl 5.27.4. This ticket
can be closed.

-zefram

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@p5pRT p5pRT commented Dec 30, 2017

From @jkeenan

On Sat, 30 Dec 2017 12​:23​:26 GMT, zefram@​fysh.org wrote​:

The code in question was fixed by commit
f14cf36 in Perl 5.27.4. This ticket
can be closed.

-zefram

Unfortunately, I cannot confirm that the problem has been solved.

This morning I followed the same procedure I described in my post of Sep 30 above. I created a branch from blead at commit dce3f5c. I then configured as follows​:

#####
sh ./Configure -des -Dusedevel -Accflags=-fsanitize=undefined -Aldflags=-fsanitize=undefined
#####

... and, using my default compiler gcc-5.4.1, ran 'make test_prep', capturing the output. The output of 'make' was free of warnings. I then re-ran the two test files in question and got the same failures as reported on Sep 30; see attachments for output of 'perl -V' and 'cd t;./perl harness -v run/fresh_perl.t run/switchd.t; cd -'.

I repeated the process with gcc 7.2.0. While I got some build-time warnings, all but 3 of them were in cpan-upstream code. I got exactly the same two test failures.

--
James E Keenan (jkeenan@​cpan.org)

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@p5pRT p5pRT commented Dec 30, 2017

From @jkeenan

# Failed test 2 - $cusp = ~0 ^ (~0 >> 1); at ./test.pl line 1062
# got "pp.c​:2701​:7​: runtime error​: signed integer overflow​: -9223372036854775808 - 1 cannot be represented in type \'long int\'\npp.c​:2799​:2​: runtime error​: negation of -9223372036854775808 cannot be represented in type \'long int\'; cast to an unsigned type to negate this value to itself\n7 0 0 8 !"
# expected "7 0 0 8 !"
# PROG​:
# $cusp = ~0 ^ (~0 >> 1);
# use integer;
# $, = " ";
# print +($cusp - 1) % 8, $cusp % 8, -$cusp % 8, 8 | (($cusp + 1) % 8 + 7), "!\n";
# STATUS​: 0
# Failed test 20 - $DB​::single set to overload at run/switchd.t line 290
# got "pp.c​:2615​:7​: runtime error​: signed integer overflow​: 9999999999 * 10000000000 cannot be represented in type \'long int\'\ndebugged\n"
# expected "debugged\n"
run/switchd.t .....
1..21
ok 1 - Got debugging output​: 1
ok 2 - Got debugging output​: 2
ok 3 - Got debugging output​: 3
ok 4 - The debugger can see the lines of the main program under \#!perl -d
ok 5 - \#!perl -d​:whatever does not throw line numbers off
ok 6 - Subroutine redefinition works in the debugger [perl \#48332]
ok 7 - Subroutines no longer found under their names can be called
ok 8 - No crash when calling orphaned subroutine via goto &
ok 9 - No crash when *DB​::DB exists but not &DB​::DB
ok 10 - No crash when &DB​::DB exists but isn't actually defined
ok 11 - DB​::DB works after '*DB​::DB if 0'
ok 12 - Recursive DB​::DB does not clobber its own pad
ok 13 - Copy on write does not mangle ${"_<-e"}[0] [perl \#118627]
ok 14 - PERL5DB with embedded newlines
ok 15 - DB​::goto
ok 16 - %DB​::lsub is not vivified
ok 17 - setting breakpoints without *DB​::dbline aliased
ok 18 - UTF8 length caches on $DB​::sub are flushed
ok 19 - -d does not conflict with sort optimisations
not ok 20 - $DB​::single set to overload
ok 21 - putenv does not interfere with PERL5OPT parsing
Failed 1/21 subtests
run/fresh_perl.t ..
1..92
ok 1 - $a = "​:="; @​_ = split /($a)/o, "a​:=b​:=c"; print "@​...
not ok 2 - $cusp = 0 ^ (0 >> 1);
ok 3 - $foo=undef; $foo->go;
ok 4 - BEGIN
ok 5 - $array[128]=1
ok 6 - $x=0x0eabcd; print $x->ref;
ok 7 - chop ($str .= <DATA>);
ok 8 - close ($banana);
ok 9 - $x=2;$y=3;$x<$y ? $x : $y += 23;print $x;
ok 10 - eval 'sub bar {print "In bar"}';
ok 11 - system './perl -ne "print if eof" /dev/null'
ok 12 - chop($file = <DATA>);
ok 13 - package N;
ok 14 - $_="foo";
ok 15 - push(@​a, 1, 2, 3,)
ok 16 - quotemeta ""
ok 17 - for ("ABCDE") {
ok 18 - package FOO;sub new {bless {FOO => BAR}};
ok 19 - $_="foo";
ok 20 - print scalar ("foo","bar")
ok 21 - sub by_number { $a <=> $b; };\# inline function for...
ok 22 - sub NewShell
ok 23 - {
ok 24 - BEGIN { die "phooey\n" }
ok 25 - BEGIN { 1/$zero }
ok 26 - BEGIN { undef = 0 }
ok 27 - {
ok 28 - my @​a; $a[2] = 1; for (@​a) { $_ = 2 } print "@​a\n"
ok 29 - \# used to attach defelem magic to all immortal val...
ok 30 - @​a = ($a, $b, $c, $d) = (5, 6);
ok 31 - print "ok\n" if (1E2<<1 == 200 and 3E4<<3 == 24000...
ok 32 - print "ok\n" if ("\0" lt "\xFF");
ok 33 - open(H,'run/fresh_perl.t'); \# must be in the 't' d...
ok 34 - sub thing { 0 || return qw(now is the time) }
ok 35 - $ren = 'joy';
ok 36 - $stimpy = 'happy';
ok 37 - package p;
ok 38 - @​list = ([ 'one', 1 ], [ 'two', 2 ]);
ok 39 - ($k, $s) = qw(x 0);
ok 40 - my $a = 'outer';
ok 41 - $| = 1;
ok 42 - $s = 0;
ok 43 - sub foo { local $_ = shift; @​_ = split; @​_ }
ok 44 - "A" =
/(?{"{"})/ \# Check it outside of eval too
ok 45 - /(?{"{"}})/ \# Check it outside of eval too
ok 46 - BEGIN { @​ARGV = qw(a b c d e) }
ok 47 - \# fdopen from a system descriptor to a system desc...
ok 48 - sub testme { my $a = "test"; { local $a = "new tes...
ok 49 - package X;
ok 50 - package X;
ok 51 - package X;
ok 52 - package X;
ok 53 - package X;
ok 54 - BEGIN {
ok 55 - package X;
ok 56 - re();
ok 57 - use strict;
ok 58 - eval '
ok 59 - if (@​ARGV) { print "" }
ok 60 - $x = sub {};
ok 61 - \# moved to op/lc.t
ok 62 - sub f { my $a = 1; my $b = 2; my $c = 3; my $d = 4...
ok 63 - \# [perl \#3066]
ok 64 - print qw(ab a\b a\\b);
ok 65 - \# lexicals declared after the myeval() definition ...
ok 66 - \# lexicals outside an eval"" should be visible ins...
ok 67 - \# [ID 20001202.002 (\#4821)] and change \#8066 added...
ok 68 - \# 20001210.003 (\#4893) mjd@​plover.com
ok 69 - \# Inaba Hiroto
ok 70 - \# Nicholas Clark
ok 71 - \# Vadim Konovalov
ok 72 - \# David Dyck
ok 73 - \# core dump in 20000716.007 (\#3516)
ok 74 - \# Bug 20010515.004 (\#6998)
ok 75 - \# Bug 20010506.041 (\#6952)
ok 76 - my $foo = Bar->new();
ok 77 - (?{...}) compilation bounces on PL_rs
ok 78 - scalar ref to file test operator segfaults on 5.6.1 [ID 20011127.155 (\#7947)]
ok 79 - [ID 20011128.159 (\#7951)] 'X' =
/\X/ segfault in 5.6.1
ok 80 - segfault in 5.6.1 within peep()
ok 81 - example from Camel 5, ch. 15, pp.406 (with my)
ok 82 - example from Camel 5, ch. 15, pp.406 (with our)
ok 83 - example from Camel 5, ch. 15, pp.406 (with package vars)
ok 84 - example from Camel 5, ch. 15, pp.406 (with use vars)
ok 85 - \# test that closures generated by eval"" hold on t...
ok 86 - [ID 20020623.009 (\#9728)] nested eval/sub segfaults
ok 87 - [perl \#17951] Strange UTF error
ok 88 - [perl \#20667] unicode regex vs non-unicode regex
ok 89 - [perl \#8760] strangeness with utf8 and warn
ok 90 - "\#75146​: 27e9045 (fix for \#23810) introduces a \#regression"
ok 91 - [perl \#112312] crash on syntax error
ok 92 - [perl \#112312] crash on syntax error - another test
Failed 1/92 subtests

Test Summary Report


run/switchd.t (Wstat​: 0 Tests​: 21 Failed​: 1)
  Failed test​: 20
run/fresh_perl.t (Wstat​: 0 Tests​: 92 Failed​: 1)
  Failed test​: 2
Files=2, Tests=113, 1 wallclock secs ( 0.05 usr 0.00 sys + 0.22 cusr 0.05 csys = 0.32 CPU)
Result​: FAIL

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@p5pRT p5pRT commented Dec 30, 2017

From @jkeenan

Summary of my perl5 (revision 5 version 27 subversion 8) configuration​:
  Commit id​: dce3f5c
  Platform​:
  osname=linux
  osvers=4.4.0-104-generic
  archname=x86_64-linux
  uname='linux zareason 4.4.0-104-generic #127-ubuntu smp mon dec 11 12​:16​:42 utc 2017 x86_64 x86_64 x86_64 gnulinux '
  config_args='-des -Dusedevel -Accflags=-fsanitize=undefined -Aldflags=-fsanitize=undefined'
  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 ='-fsanitize=undefined -fno-strict-aliasing -pipe -fstack-protector-strong -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64'
  optimize='-O2'
  cppflags='-fsanitize=undefined -fno-strict-aliasing -pipe -fstack-protector-strong -I/usr/local/include'
  ccversion=''
  gccversion='5.4.1 20160904'
  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='cc'
  ldflags =' -fsanitize=undefined -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 /lib64 /usr/lib64
  libs=-lpthread -lnsl -ldb -ldl -lm -lcrypt -lutil -lc
  perllibs=-lpthread -lnsl -ldl -lm -lcrypt -lutil -lc
  libc=libc-2.23.so
  so=so
  useshrplib=false
  libperl=libperl.a
  gnulibc_version='2.23'
  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-strong'

Characteristics of this binary (from libperl)​:
  Compile-time options​:
  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
  Built under linux
  Compiled at Dec 30 2017 08​:47​:37
  %ENV​:
  PERL2DIR="/home/jkeenan/gitwork/perl2"
  PERLBREW_BASHRC_VERSION="0.78"
  PERLBREW_HOME="/home/jkeenan/.perlbrew"
  PERLBREW_MANPATH="/home/jkeenan/perl5/perlbrew/perls/perl-5.26.0/man"
  PERLBREW_PATH="/home/jkeenan/perl5/perlbrew/bin​:/home/jkeenan/perl5/perlbrew/perls/perl-5.26.0/bin"
  PERLBREW_PERL="perl-5.26.0"
  PERLBREW_ROOT="/home/jkeenan/perl5/perlbrew"
  PERLBREW_VERSION="0.78"
  PERL_WORKDIR="/home/jkeenan/gitwork/perl"
  @​INC​:
  lib
  /usr/local/lib/perl5/site_perl/5.27.8/x86_64-linux
  /usr/local/lib/perl5/site_perl/5.27.8
  /usr/local/lib/perl5/5.27.8/x86_64-linux
  /usr/local/lib/perl5/5.27.8

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@p5pRT p5pRT commented Dec 30, 2017

From zefram@fysh.org

James E Keenan via RT wrote​:

I got exactly the same two test failures.

Those test failures are nothing to do with the problem that this ticket
is about, which was a call to memcpy() with a null argument. That call
has been fixed by the insertion of a conditional checking that there is
a non-zero amount of data to copy.

Your test failures are complaining of signed integer overflow, which
is off the topic of this ticket, but anyway is not a bug. By default
such overflow is a bug in C code, but perl has different arrangements.
We rely on signed integer arithmetic wrapping, and by default we feed gcc
the -fwrapv option to tell it to provide those semantics. That option
doesn't appear in your ccflags, so something's wrong in how your ccflags
were determined.

If there's a claim that Configure failed to insert the -fwrapv option
when it should have, that would be worth opening a new ticket. It's off
topic for this one.

-zefram

@p5pRT
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@p5pRT p5pRT commented Jan 2, 2018

@iabyn - Status changed from 'open' to 'pending release'

@p5pRT
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@p5pRT p5pRT commented Jun 23, 2018

From @khwilliamson

Thank you for filing this report. You have helped make Perl better.

With the release yesterday of Perl 5.28.0, this and 185 other issues have been
resolved.

Perl 5.28.0 may be downloaded via​:
https://metacpan.org/release/XSAWYERX/perl-5.28.0

If you find that the problem persists, feel free to reopen this ticket.

@p5pRT
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@p5pRT p5pRT commented Jun 23, 2018

@khwilliamson - Status changed from 'pending release' to 'resolved'

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