Since I now know that the original crash had another cause as the one desribed above, now I did the following:

Now I have some similar crash to the original one with Perl 5.10.0 / Ubuntu 9.10 (then: crash in Perl_pad_swipe, now: crash in Perl_pad_free). The cause seems very complicated to me as it is a combination of serveral modules and code.

I removed as much code as possible while making the script still crash.
This is what remains, where the core dump / segfault disappears if I remove ANY of the parts marked by XXX.

#!/usr/bin/perl -w
use strict;
use warnings;
use POSIX; # XXX -- module
use MooseX::Declare;
use namespace::autoclean; # XXX -- module

class Ida::Config with MooseX::Log::Log4perl is mutable {
    use strict;
    use warnings;
    use Moose::Util::TypeConstraints;
    
    # XXX -- some attribute
    has dummyAttribute => (
        isa => 'Str',
        is => 'rw',
        default => sub { [] },
    );
    
    #                     XXX -- an unknown type
    method isAllowedIp(UnknownType $ip!) {
        return;
    }
}
1;

[download]

Result:

tux@sm00123:~/Projects/infotool$ ./test2.pl 

'UnknownType' could not be parsed to a type constraint - maybe you nee
+d to pre-declare the type with class_type at /home/tux/CPAN/lib/perl5
+/MooseX/Declare/Syntax/MethodDeclaration.pm line 40
Segmentation fault (Speicherabzug geschrieben)

[download]

The error code is ok, but why a segfault?

Debugger gives me:

tux@sm00123:~/Projects/infotool$ gdb /usr/bin/perl ./core
GNU gdb (GDB) 7.1-ubuntu
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gp
+l.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copy
+ing"
and "show warranty" for details.
This GDB was configured as "i486-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/bin/perl...(no debugging symbols found)...do
+ne.
[New Thread 24238]

warning: Can't read pathname for load map: Input/output error.
Reading symbols from /lib/tls/i686/cmov/libdl.so.2...(no debugging sym
+bols found)...done.
Loaded symbols for /lib/tls/i686/cmov/libdl.so.2
Reading symbols from /lib/tls/i686/cmov/libm.so.6...(no debugging symb
+ols found)...done.
Loaded symbols for /lib/tls/i686/cmov/libm.so.6
Reading symbols from /lib/tls/i686/cmov/libpthread.so.0...(no debuggin
+g symbols found)...done.
Loaded symbols for /lib/tls/i686/cmov/libpthread.so.0
Reading symbols from /lib/tls/i686/cmov/libc.so.6...(no debugging symb
+ols found)...done.
Loaded symbols for /lib/tls/i686/cmov/libc.so.6
Reading symbols from /lib/tls/i686/cmov/libcrypt.so.1...(no debugging 
+symbols found)...done.
Loaded symbols for /lib/tls/i686/cmov/libcrypt.so.1
Reading symbols from /lib/ld-linux.so.2...(no debugging symbols found)
+...done.
Loaded symbols for /lib/ld-linux.so.2
Reading symbols from /usr/lib/perl/5.10/auto/Fcntl/Fcntl.so...(no debu
+gging symbols found)...done.
Loaded symbols for /usr/lib/perl/5.10/auto/Fcntl/Fcntl.so
Reading symbols from /usr/lib/perl/5.10/auto/POSIX/POSIX.so...(no debu
+gging symbols found)...done.
Loaded symbols for /usr/lib/perl/5.10/auto/POSIX/POSIX.so
Reading symbols from /usr/lib/perl/5.10/auto/List/Util/Util.so...(no d
+ebugging symbols found)...done.
Loaded symbols for /usr/lib/perl/5.10/auto/List/Util/Util.so
Reading symbols from /usr/lib/perl/5.10/auto/mro/mro.so...(no debuggin
+g symbols found)...done.
Loaded symbols for /usr/lib/perl/5.10/auto/mro/mro.so
Reading symbols from /home/tux/CPAN/lib/perl5/i486-linux-gnu-thread-mu
+lti/auto/Params/Util/Util.so...done.
Loaded symbols for /home/tux/CPAN/lib/perl5/i486-linux-gnu-thread-mult
+i/auto/Params/Util/Util.so
Reading symbols from /usr/lib/perl5/auto/Sub/Name/Name.so...(no debugg
+ing symbols found)...done.
Loaded symbols for /usr/lib/perl5/auto/Sub/Name/Name.so
Reading symbols from /home/tux/CPAN/lib/perl5/i486-linux-gnu-thread-mu
+lti/auto/Devel/GlobalDestruction/GlobalDestruction.so...done.
Loaded symbols for /home/tux/CPAN/lib/perl5/i486-linux-gnu-thread-mult
+i/auto/Devel/GlobalDestruction/GlobalDestruction.so
Reading symbols from /home/tux/CPAN/lib/perl5/i486-linux-gnu-thread-mu
+lti/auto/Class/MOP/MOP.so...done.
Loaded symbols for /home/tux/CPAN/lib/perl5/i486-linux-gnu-thread-mult
+i/auto/Class/MOP/MOP.so
Reading symbols from /home/tux/CPAN/lib/perl5/i486-linux-gnu-thread-mu
+lti/auto/List/MoreUtils/MoreUtils.so...done.
Loaded symbols for /home/tux/CPAN/lib/perl5/i486-linux-gnu-thread-mult
+i/auto/List/MoreUtils/MoreUtils.so
Reading symbols from /home/tux/CPAN/lib/perl5/i486-linux-gnu-thread-mu
+lti/auto/Moose/Moose.so...done.
Loaded symbols for /home/tux/CPAN/lib/perl5/i486-linux-gnu-thread-mult
+i/auto/Moose/Moose.so
Reading symbols from /home/tux/CPAN/lib/perl5/i486-linux-gnu-thread-mu
+lti/auto/Variable/Magic/Magic.so...done.
Loaded symbols for /home/tux/CPAN/lib/perl5/i486-linux-gnu-thread-mult
+i/auto/Variable/Magic/Magic.so
Reading symbols from /home/tux/CPAN/lib/perl5/i486-linux-gnu-thread-mu
+lti/auto/Sub/Identify/Identify.so...done.
Loaded symbols for /home/tux/CPAN/lib/perl5/i486-linux-gnu-thread-mult
+i/auto/Sub/Identify/Identify.so
Reading symbols from /usr/lib/perl/5.10/auto/Digest/MD5/MD5.so...(no d
+ebugging symbols found)...done.
Loaded symbols for /usr/lib/perl/5.10/auto/Digest/MD5/MD5.so
Reading symbols from /home/tux/CPAN/lib/perl5/i486-linux-gnu-thread-mu
+lti/auto/Clone/Clone.so...(no debugging symbols found)...done.
Loaded symbols for /home/tux/CPAN/lib/perl5/i486-linux-gnu-thread-mult
+i/auto/Clone/Clone.so
Reading symbols from /home/tux/CPAN/lib/perl5/i486-linux-gnu-thread-mu
+lti/auto/B/Hooks/OP/Check/Check.so...done.
Loaded symbols for /home/tux/CPAN/lib/perl5/i486-linux-gnu-thread-mult
+i/auto/B/Hooks/OP/Check/Check.so
Reading symbols from /home/tux/CPAN/lib/perl5/i486-linux-gnu-thread-mu
+lti/auto/Devel/Declare/Declare.so...done.
Loaded symbols for /home/tux/CPAN/lib/perl5/i486-linux-gnu-thread-mult
+i/auto/Devel/Declare/Declare.so
Core was generated by `perl -I/home/tux/CPAN/lib/perl5 -I/home/tux/Pro
+jects/infotool/lib -c -w'.
Program terminated with signal 11, Segmentation fault.
#0  0x080a26a5 in Perl_pad_free ()

[download]

In reply to Perl crash by maxhq
in thread Segfault in Sub::Name by maxhq

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