gdb) where
#0  0x00a3e41d in memmove () from /lib/libc.so.6
#1  0x078122c1 in Perl_sv_catpvn_flags () from /usr/lib/perl5/5.8.6/i386-linux-thread-multi/CORE/libperl.so
#2  0x07816196 in Perl_sv_catsv_flags () from /usr/lib/perl5/5.8.6/i386-linux-thread-multi/CORE/libperl.so
#3  0x0784eaf4 in Perl_do_join () from /usr/lib/perl5/5.8.6/i386-linux-thread-multi/CORE/libperl.so
#4  0x077fcaca in Perl_pp_join () from /usr/lib/perl5/5.8.6/i386-linux-thread-multi/CORE/libperl.so
#5  0x077e4b01 in Perl_runops_debug () from /usr/lib/perl5/5.8.6/i386-linux-thread-multi/CORE/libperl.so
#6  0x07792b9e in Perl_get_cv () from /usr/lib/perl5/5.8.6/i386-linux-thread-multi/CORE/libperl.so
#7  0x07797045 in Perl_call_sv () from /usr/lib/perl5/5.8.6/i386-linux-thread-multi/CORE/libperl.so
#8  0x07799517 in Perl_call_method () from /usr/lib/perl5/5.8.6/i386-linux-thread-multi/CORE/libperl.so
#9  0x077ef199 in Perl_magic_setnkeys () from /usr/lib/perl5/5.8.6/i386-linux-thread-multi/CORE/libperl.so
#10 0x077ef5fc in Perl_magic_setpack () from /usr/lib/perl5/5.8.6/i386-linux-thread-multi/CORE/libperl.so
#11 0x077ed7ee in Perl_mg_set () from /usr/lib/perl5/5.8.6/i386-linux-thread-multi/CORE/libperl.so
#12 0x077fba16 in Perl_pp_sassign () from /usr/lib/perl5/5.8.6/i386-linux-thread-multi/CORE/libperl.so
#13 0x077e4b01 in Perl_runops_debug () from /usr/lib/perl5/5.8.6/i386-linux-thread-multi/CORE/libperl.so
#14 0x07797f51 in perl_run () from /usr/lib/perl5/5.8.6/i386-linux-thread-multi/CORE/libperl.so
#15 0x080493f4 in main ()