Segfault in extend.c/ parrot_pmc_get_pointer

Hi, today I hit a little bug

#0  0x081cef45 in Parrot_PMC_get_pointer (interp=0x82d7f78, 
pmc=0x83333a0)
     at src/extend.c:44
#1  0x080c5403 in Perl_macro_LvTYPE (sv=0x82d3410) at sv.c:1280
#2  0x080b196f in Perl_hv_fetch_ent (hv=0x8387588, keysv=0x82d3400, 
lval=0,
     hash=4044421188) at hv.c:402
#3  0x080be9cc in Perl_pp_helem () at pp_hot.c:1675
#4  0x080a24f5 in Perl_runops_debug () at dump.c:1439
#5  0x08060e00 in S_run_body (oldscope=1) at perl.c:1711
#6  0x08060968 in perl_run (my_perl=0x82d1b68) at perl.c:1630
#7  0x0804bfed in main (argc=4, argv=0xbfffdbe4, env=0xbfffdbf8)
     at miniperlmain.c:86
#8  0x42017589 in __libc_start_main () from /lib/i686/libc.so.6

As far as I can tell the parrot interp is correct and the PMC too, the 
class is a perl5lv.pmc and it has a init that looks like this:

     void init () {	
	PMC_data(SELF) = malloc(sizeof(perl5lv_pmc_data));
     }

and it also has

     void init () {	
	PMC_data(SELF) = malloc(sizeof(perl5lv_pmc_data));
     }

Any suggestions?

Arthur

ps, does parrot have an abstraction for malloc? also, please reply to 
both ponie-dev/perl6-internals