Bleadperl segv in arybase and elsewhere

Since my smoker started running with v5.15.4-25-g3b8d3bd it has produced
650 SEGV of which there were 290 in arybase.so. I can produce them quite
reliably by running

  perl -MCPAN -eshell
  cpan> m CPAN

But there were plenty processes running with the CPAN shell that
somehow survived.

I append an example stacktrace. Let me know if I can provide more
insight.

(gdb) bt
#0  ab_ck_sassign (my_perl=0x1a58010, o=<value optimized out>)
    at arybase.xs:171
#1  0x0000000000423451 in Perl_newBINOP (my_perl=0x1a58010, type=37, flags=2, 
    first=0x9cb1050, last=0x9cb1020) at op.c:3709
#2  0x000000000042fcf0 in Perl_newASSIGNOP (my_perl=0x1a58010, flags=64, 
    left=0x9cb1020, optype=<value optimized out>, right=0x9cb1050) at op.c:5144
#3  0x000000000045e055 in Perl_yyparse (my_perl=0x1a58010, 
    gramtype=<value optimized out>) at perly.y:897
#4  0x00000000004d7cae in S_doeval (my_perl=0x1a58010, 
    gimme=<value optimized out>, startop=0x0, outside=<value optimized out>, 
    seq=<value optimized out>) at pp_ctl.c:3534
#5  0x00000000004d99be in Perl_pp_require (my_perl=0x1a58010) at pp_ctl.c:4102
#6  0x000000000049e436 in Perl_runops_standard (my_perl=0x1a58010) at run.c:41
#7  0x0000000000434a34 in Perl_call_sv (my_perl=<value optimized out>, 
    sv=0x9b735d0, flags=14) at perl.c:2686
#8  0x0000000000434f8d in Perl_call_list (my_perl=<value optimized out>, 
    oldscope=<value optimized out>, paramList=<value optimized out>)
    at perl.c:4749
#9  0x000000000041ea07 in S_process_special_blocks (my_perl=0x1a58010, 
    fullname=<value optimized out>, gv=0x9b73510, cv=0x9b735d0) at op.c:6807
#10 0x000000000042f010 in Perl_newATTRSUB (my_perl=0x1a58010, 
    floor=<value optimized out>, o=0x2c4f5f0, proto=<value optimized out>, 
    attrs=<value optimized out>, block=<value optimized out>) at op.c:6778
#11 0x000000000042dba9 in Perl_utilize (my_perl=0x1a58010, 
    aver=<value optimized out>, floor=<value optimized out>, 
    version=<value optimized out>, idop=0x9b7dbc0, arg=<value optimized out>)
    at op.c:4633
#12 0x000000000045e8ba in Perl_yyparse (my_perl=0x1a58010, 
    gramtype=<value optimized out>) at perly.y:361
#13 0x00000000004d7cae in S_doeval (my_perl=0x1a58010, 
    gimme=<value optimized out>, startop=0x0, outside=<value optimized out>, 
    seq=<value optimized out>) at pp_ctl.c:3534
#14 0x00000000004d99be in Perl_pp_require (my_perl=0x1a58010) at pp_ctl.c:4102
#15 0x000000000049e436 in Perl_runops_standard (my_perl=0x1a58010) at run.c:41
#16 0x00000000004354f2 in S_run_body (my_perl=<value optimized out>)
    at perl.c:2378
#17 perl_run (my_perl=<value optimized out>) at perl.c:2301
#18 0x000000000041cecc in main (argc=4, argv=0x7fff159b3638, 
    env=0x7fff159b3660) at perlmain.c:120


perl -V
-------
Summary of my perl5 (revision 5 version 15 subversion 4) configuration:
  Commit id: c73c07e4506ef659dc543d7755cba281bfd78e6d
  Platform:
    osname=linux, osvers=2.6.32-5-amd64, archname=x86_64-linux-thread-multi-ld
    uname='linux k83 2.6.32-5-amd64 #1 smp mon oct 3 03:59:20 utc 2011 x86_64 gnulinux '
    config_args='-Dprefix=/home/src/perl/repoperls/installed-perls/perl/v5.15.4-33-gc73c07e/a2da -Dmyhostname=k83 -Dinstallusrbinperl=n -Uversiononly -Dusedevel -des -Ui_db -Duseithreads -Duselongdouble -DDEBUGGING=-g'
    hint=recommended, useposix=true, d_sigaction=define
    useithreads=define, usemultiplicity=define
    useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=undef
    use64bitint=define, use64bitall=define, uselongdouble=define
    usemymalloc=n, bincompat5005=undef
  Compiler:
    cc='cc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
    optimize='-O2 -g',
    cppflags='-D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include'
    ccversion='', gccversion='4.4.5', 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='long double', nvsize=16, Off_t='off_t', lseeksize=8
    alignbytes=16, prototype=define
  Linker and Libraries:
    ld='cc', ldflags =' -fstack-protector -L/usr/local/lib'
    libpth=/usr/local/lib /lib/../lib /usr/lib/../lib /lib /usr/lib /lib64 /usr/lib64
    libs=-lnsl -ldb -ldl -lm -lcrypt -lutil -lpthread -lc
    perllibs=-lnsl -ldl -lm -lcrypt -lutil -lpthread -lc
    libc=/lib/libc-2.11.2.so, so=so, useshrplib=false, libperl=libperl.a
    gnulibc_version='2.11.2'
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E'
    cccdlflags='-fPIC', lddlflags='-shared -O2 -g -L/usr/local/lib -fstack-protector'


Characteristics of this binary (from libperl): 
  Compile-time options: HAS_TIMES MULTIPLICITY PERLIO_LAYERS
                        PERL_DONT_CREATE_GVSV PERL_IMPLICIT_CONTEXT
                        PERL_MALLOC_WRAP PERL_PRESERVE_IVUV PERL_USE_DEVEL
                        USE_64_BIT_ALL USE_64_BIT_INT USE_ITHREADS
                        USE_LARGE_FILES USE_LOCALE USE_LOCALE_COLLATE
                        USE_LOCALE_CTYPE USE_LOCALE_NUMERIC USE_LONG_DOUBLE
                        USE_PERLIO USE_PERL_ATOF USE_REENTRANT_API
  Built under linux
  Compiled at Oct 26 2011 06:22:38
  @INC:
    /home/src/perl/repoperls/installed-perls/perl/v5.15.4-33-gc73c07e/a2da/lib/site_perl/5.15.4/x86_64-linux-thread-multi-ld
    /home/src/perl/repoperls/installed-perls/perl/v5.15.4-33-gc73c07e/a2da/lib/site_perl/5.15.4
    /home/src/perl/repoperls/installed-perls/perl/v5.15.4-33-gc73c07e/a2da/lib/5.15.4/x86_64-linux-thread-multi-ld
    /home/src/perl/repoperls/installed-perls/perl/v5.15.4-33-gc73c07e/a2da/lib/5.15.4
    .



-- 
andreas

• Bleadperl segv in arybase and elsewhere by andreas.koenig.7os6VVqR