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[perl #32968] B::walkoptree segfaults

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From:
Alexey Tourbin
Date:
December 8, 2004 14:26
Subject:
[perl #32968] B::walkoptree segfaults
Message ID:
rt-3.0.11-32968-102425.18.9788274049398@perl.org
# New Ticket Created by  Alexey Tourbin 
# Please include the string:  [perl #32968]
# in the subject line of all future correspondence about this issue. 
# <URL: http://rt.perl.org:80/rt3/Ticket/Display.html?id=32968 >


This is a bug report for perl from at@altlinux.ru,
generated with the help of perlbug 1.35 running under perl v5.8.4.


-----------------------------------------------------------------
[Please enter your report here]

Hello,

Recently I reported this bug on perl5-porters mailing list.
Since there seems to be no immediate interest to this bug,
I file it for future revision.  I assign severity=high
because it makes perl crash with a simple expression
given on a command line:

$ perl -MO=Debug /usr/lib/perl5/perl5db.pl >/dev/null
zsh: segmentation fault  perl -MO=Debug /usr/lib/perl5/perl5db.pl > /dev/null
$ perl -MO=Bblock /usr/lib/perl5/perl5db.pl
zsh: segmentation fault  perl -MO=Bblock /usr/lib/perl5/perl5db.pl
$

Detailed explanation and test cases are available via the following
links:

http://www.nntp.perl.org/group/perl.perl5.porters/96442
http://www.nntp.perl.org/group/perl.perl5.porters/96482
http://www.nntp.perl.org/group/perl.perl5.porters/96485

The problem seems to be somewhere around pmreplroot: Perl always expects
pmreplroot to be a reference (or a pointer), while occasionally
pmreplroot is a scalar (or an integer).

-- 
Alexey Tourbin
ALT Linux Team


[Please do not change anything below this line]
-----------------------------------------------------------------
---
Flags:
    category=core
    severity=high
---
Site configuration information for perl v5.8.4:

Configured by ALT Linux Team at Mon Aug  9 06:08:01 MSD 2004.

Summary of my perl5 (revision 5 version 8 subversion 4) configuration:
  Platform:
    osname=linux, osvers=2.4.18-alt6master-up, archname=i386-linux-thread-multi
    uname='linux solemn.turbinal.org 2.4.18-alt6master-up #1 tue apr 16 14:50:56 msd 2002 i686 unknown unknown gnulinux '
    config_args='-de -rs -Darchname=i386-linux -Dd_dosuid -Ud_csh -Dlibswanted=dl m c crypt db ndbm gdbm -Duseshrplib -Dlibperl=libperl.so.5.8 -Dcc=gcc -Doptimize=-pipe -mmmx -Wall -Os -march=i686 -D_GNU_SOURCE -momit-leaf-frame-pointer -Dcccdlflags=-fPIC -DPIC -Dccdlflags=-rdynamic -Wl,-O1 -Dlddlflags=-shared -Wl,-O1 -Dldflags=-Wl,-O1 -Dinstallprefix=/usr -Dprefix=/usr -Dprivlib=/usr/lib/perl5 -Darchlib=/usr/lib/perl5/i386-linux -Dvendorprefix=/usr -Dvendorlib=/usr/lib/perl5/vendor_perl -Dvendorarch=/usr/lib/perl5/vendor_perl/i386-linux -Dman1dir=/usr/share/man/man1 -Dman3dir=/usr/share/man/man3 -Dvendorman1dir=/usr/share/man/man1 -Dvendorman3dir=/usr/share/man/man3 -Dsiteprefix=/usr/local -Dsitelib=/usr/local/lib/perl5/site_perl/5.8.4 -Dsitearch=/usr/local/lib/perl5/site_perl/5.8.4/i386-linux -Dsiteman1dir=/usr/local/man/man1 -Dsite_man3dir=/usr/local/man/man3 -Dcf_by=ALT Linux Team -Dcf_email=qa@altlinux.org -Dmyhostname=localhost -Dperladmin=root@localhost -Dmyuname=Linux 2.4.18-alt6master-up i686 -Dnewmyuname=Linux 2.4.18-alt6master-up i686 -Dinc_version_list=5.8.3/i386-linux 5.8.2/i386-linux 5.8.1/i386-linux 5.8.0/i386-linux 5.8.3 5.8.2 5.8.1 5.8.0 5.6.1 5.6.0 -Dpager=/usr/bin/less -isR -Di_shadow -Di_syslog -Dusethreads -Duseithreads -Duselargefiles -Di_db -Di_gdbm -Di_ndbm -Di_sdbm -Ui_odbm'
    hint=recommended, useposix=true, d_sigaction=define
    usethreads=define use5005threads=undef useithreads=define usemultiplicity=define
    useperlio=define d_sfio=undef uselargefiles=define usesocks=undef
    use64bitint=undef use64bitall=undef uselongdouble=undef
    usemymalloc=n, bincompat5005=undef
  Compiler:
    cc='gcc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -DTHREADS_HAVE_PIDS -fno-strict-aliasing -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -I/usr/include/gdbm',
    optimize='-pipe -mmmx -Wall -Os -march=i686 -D_GNU_SOURCE -momit-leaf-frame-pointer',
    cppflags='-D_REENTRANT -D_GNU_SOURCE -DTHREADS_HAVE_PIDS -fno-strict-aliasing -I/usr/local/include -I/usr/include/gdbm'
    ccversion='', gccversion='3.3.3 20040412 (ALT Linux, build 3.3.3-alt5)', gccosandvers=''
    intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=1234
    d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12
    ivtype='long', ivsize=4, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=8
    alignbytes=4, prototype=define
  Linker and Libraries:
    ld='gcc', ldflags ='-Wl,-O1 -L/usr/local/lib'
    libpth=/usr/local/lib /lib /usr/lib
    libs=-ldl -lm -lpthread -lc -lcrypt -ldb -lgdbm
    perllibs=-ldl -lm -lpthread -lc -lcrypt
    libc=/lib/libc-2.3.3.so, so=so, useshrplib=true, libperl=libperl.so.5.8
    gnulibc_version='2.3.3'
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-rdynamic -Wl,-O1'
    cccdlflags='-fPIC -DPIC', lddlflags='-shared -Wl,-O1 -L/usr/local/lib'

Locally applied patches:
    

---
@INC for perl v5.8.4:
    /etc/perl5
    /usr/lib/perl5/i386-linux
    /usr/lib/perl5
    /usr/local/lib/perl5/site_perl/5.8.4/i386-linux
    /usr/local/lib/perl5/site_perl/5.8.4
    /usr/local/lib/perl5/site_perl/5.8.2/i386-linux
    /usr/local/lib/perl5/site_perl/5.8.1/i386-linux
    /usr/local/lib/perl5/site_perl/5.8.2
    /usr/local/lib/perl5/site_perl/5.8.1
    /usr/local/lib/perl5/site_perl/5.6.1
    /usr/local/lib/perl5/site_perl
    /usr/lib/perl5/vendor_perl/i386-linux
    /usr/lib/perl5/vendor_perl
    /usr/lib/perl5/vendor_perl
    .

---
Environment for perl v5.8.4:
    HOME=/home/at
    LANG=C
    LANGUAGE (unset)
    LC_COLLATE=ru_RU.CP1251
    LC_CTYPE=ru_RU.CP1251
    LC_MESSAGES=C
    LC_MONETARY=ru_RU.CP1251
    LC_NUMERIC=ru_RU.CP1251
    LC_TIME=C
    LD_LIBRARY_PATH (unset)
    LOGDIR (unset)
    PATH=/home/at/bin:/bin:/usr/bin:/usr/X11R6/bin:/usr/local/bin:/usr/games:/sbin:/usr/sbin:/usr/local/sbin
    PERL_BADLANG (unset)
    SHELL=/bin/zsh


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