From @nwc10

On Wed, Apr 21, 2010 at 03:08:58PM +0200, Rafael Garcia-Suarez wrote:

On 21 April 2010 02:03, Daniel Pfeiffer <perlbug-followup@perl.org> wrote:

One of the utilities of makepp SEGVs in the regression test on each of Linux
x86 and Win (both ActiveState) and Solaris 10 Sparc self compiled as 32bit.
This last worked with CPAN testers on i86pc-solaris-V5.11.5.

I have narrowed it down to the following little test:

#!/usr/bin/perl -w

sub f {
lstat '/';
-d _;
}

$_ = split /x/, f;

The context split (with any regexp) is needed, though it crashes in -d _.

#0 0x0810f3fb in Perl_pp_ftrowned ()
#1 0x080cb352 in Perl_runops_standard ()
#2 0x08074af2 in S_run_body ()
#3 0x0807498a in perl_run ()
#4 0x08060ded in main ()

Besides a fix for future versions, I am desperate for a workaround ;-)

Apparently, a workaround is to use a perl compiled with -DDEBUGGING support...

I'm not sure. I've now build a perl without that on Linux, and I see no
problem either. I can't replicate this.

$ ./perl -Ilib -V
Summary of my perl5 (revision 5 version 13 subversion 0) configuration:
Derived from: f768f60
Platform:
osname=linux, osvers=2.6.18.8-xenu, archname=x86_64-linux
uname='linux eris 2.6.18.8-xenu #1 smp sat oct 3 10:27:42 bst 2009 x86_64 gnulinux '
config_args='-Dusedevel=y -Dcc=ccache gcc -Dld=gcc -Ubincompat5005 -Uinstallusrbinperl -Dcf_email=nick@ccl4.org -Dperladmin=nick@ccl4.org -Dinc_version_list= -Dinc_version_list_init=0 -Doptimize=-Os -Uusethreads -Uuse64bitall -Uusemymalloc -Duseperlio -Dprefix=~~/Sandpit/snap5.9.x-v5.13.0-14-gf768f60 -Uusevendorprefix -Uvendorprefix=~~/Sandpit/snap5.9.x-v5.13.0-14-gf768f60 -Dinstallman1dir=none -Dinstallman3dir=none -Uuserelocatableinc -de'
hint=recommended, useposix=true, d_sigaction=define
useithreads=undef, usemultiplicity=undef
useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=undef
use64bitint=define, use64bitall=undef, uselongdouble=undef
usemymalloc=n, bincompat5005=undef
Compiler:
cc='ccache gcc', ccflags ='-fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
optimize='-Os',
cppflags='-fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include'
ccversion='', gccversion='4.3.2', gccosandvers=''
intsize=4, longsize=8, ptrsize=8, doublesize=8, byteorder=12345678
d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=16
ivtype='long', ivsize=8, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=8
alignbytes=8, prototype=define
Linker and Libraries:
ld='gcc', ldflags =' -fstack-protector -L/usr/local/lib'
libpth=/usr/local/lib /lib /usr/lib /lib64 /usr/lib64
libs=-lnsl -ldb -ldl -lm -lcrypt -lutil -lc
perllibs=-lnsl -ldl -lm -lcrypt -lutil -lc
libc=/lib/libc-2.7.so, so=so, useshrplib=false, libperl=libperl.a
gnulibc_version='2.7'
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E'
cccdlflags='-fPIC', lddlflags='-shared -Os -L/usr/local/lib -fstack-protector'

Characteristics of this binary (from libperl):
Compile-time options: PERL_DONT_CREATE_GVSV PERL_MALLOC_WRAP PERL_USE_DEVEL
USE_64_BIT_INT USE_LARGE_FILES USE_PERLIO
USE_PERL_ATOF
Locally applied patches:
uncommitted-changes
Built under linux
Compiled at Apr 21 2010 14:21:19
@INC:
lib
/home/nick/Sandpit/snap5.9.x-v5.13.0-14-gf768f60/lib/perl5/site_perl/5.13.0/x86_64-linux
/home/nick/Sandpit/snap5.9.x-v5.13.0-14-gf768f60/lib/perl5/site_perl/5.13.0
/home/nick/Sandpit/snap5.9.x-v5.13.0-14-gf768f60/lib/perl5/5.13.0/x86_64-linux
/home/nick/Sandpit/snap5.9.x-v5.13.0-14-gf768f60/lib/perl5/5.13.0
.

So I'm not sure how to replicate this, or, for that matter, what changes
ActiveState make from the 5.12.0 release to build their perl

A: could you send the output of perl -V for your perl on Linux
B: are you able to build the 5.12.0 release from source (on Linux is most
useful) and replicate your problem with that? Stack traces sadly aren't
that useful unless they have debugging symbols.
(Source is at http://www.cpan.org/src/perl-5.12.0.tar.bz2 for example)

Nicholas Clark

5.12.0 crash on diverse platforms #10335

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