#0  0xfedd49f2 in t_splay () from /lib/libc.so.1
(gdb) backtrace
#0  0xfedd49f2 in t_splay () from /lib/libc.so.1
#1  0xfedd48d0 in t_delete () from /lib/libc.so.1
#2  0xfedd4629 in realfree () from /lib/libc.so.1
#3  0xfedd4c13 in cleanfree () from /lib/libc.so.1
#4  0xfedd412f in _malloc_unlocked () from /lib/libc.so.1
#5  0xfedd4058 in malloc () from /lib/libc.so.1
#6  0x080bf003 in Perl_safesysmalloc ()
#7  0x080dbe4c in Perl_pp_entersub ()
#8  0x00000005 in ?? ()