Segmentation fault

Hej folks,

While writing perl tests for a framework I'm working on I ran into some weird segmentation faults today.
I started noticing them in a test after changing they way error were returned in some unrelated object, which involves returning an internal error string that appends $DBI::errstr if available. We check $dbh->err() if available and $DBI::errstr for errors.
Funny thing is: the segfault only occurs 2 out of 5 times orso.

The segfault always seems to happen after disconnect(), I'm guessing on termination of the program when perl starts cleaning up stuff.

Here's a stacktrace when it segfaults on DBI:
===
1..20

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff5cd7471 in err_hash.isra.6 () from /usr/local/lib64/perl5/auto/DBI/DBI.so
(gdb) bt full
#0  0x00007ffff5cd7471 in err_hash.isra.6 () from /usr/local/lib64/perl5/auto/DBI/DBI.so
No symbol table info available.
#1  0x00007ffff5cdbfe6 in XS_DBI_dispatch () from /usr/local/lib64/perl5/auto/DBI/DBI.so
No symbol table info available.
#2  0x00007ffff7b0a416 in Perl_pp_entersub () from /usr/lib64/perl5/CORE/libperl.so
No symbol table info available.
#3  0x00007ffff7a942f6 in Perl_call_sv () from /usr/lib64/perl5/CORE/libperl.so
No symbol table info available.
#4  0x00007ffff7b13471 in ?? () from /usr/lib64/perl5/CORE/libperl.so
No symbol table info available.
#5  0x00007ffff7b13bb0 in Perl_sv_clear () from /usr/lib64/perl5/CORE/libperl.so
No symbol table info available.
#6  0x00007ffff7b1423d in Perl_sv_free2 () from /usr/lib64/perl5/CORE/libperl.so
No symbol table info available.
#7  0x00007ffff7b0b7e7 in ?? () from /usr/lib64/perl5/CORE/libperl.so
No symbol table info available.
#8  0x00007ffff7b147f6 in Perl_sv_clean_objs () from /usr/lib64/perl5/CORE/libperl.so
No symbol table info available.
#9  0x00007ffff7a96570 in perl_destruct () from /usr/lib64/perl5/CORE/libperl.so
No symbol table info available.
#10 0x0000000000400ed1 in main ()
No symbol table info available.
(gdb) 
===
Does anyone have any idea what causes this? Or how to debug this properly?
I just installed the latest versions of DBI and DBD::mysql, that didn't help.

Thanks for reading.

Wouter.