id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc	lang	patch	platform
1499	Null pointer dereference in imageio.pmc	arnsholt	plobsing	"Running Parrot r44371, Rakudo bf29be, OS X 10.6.2.

When running perl6 t/spec/S32-trig/sinh.t I get intermittent segfaults. I've recompiled both Parrot and Rakudo with debugging symbols, giving the following gdb backtrace:

{{{
(gdb) back
#0  0x0000000000000000 in ?? ()
#1  0x0000000100ce13ec in visit_todo_list_freeze (interp=0x101208890, pmc=0x10cadd220, info=0x10cadd1f8) at imageio.pmc:204
#2  0x0000000100ce1c7b in Parrot_ImageIO_set_pmc (interp=0x101208890, pmc=0x10cadd1f8, p=0x10cadd220) at imageio.pmc:492
#3  0x0000000100b94e15 in Parrot_freeze (interp=0x101208890, pmc=0x10cadd220) at src/pmc_freeze.c:58
#4  0x0000000100c6d09d in Parrot_default_clone (interp=0x101208890, pmc=0x10cadd220) at default.pmc:1068
#5  0x0000000100b897fb in Parrot_oo_clone_object (interp=0x101208890, pmc=0x1061b7d18, class_=0x102217ea8, dest=0x0) at src/oo.c:291
#6  0x0000000100cf9dba in Parrot_Object_clone (interp=0x101208890, pmc=0x1061b7d18) at object.pmc:723
#7  0x00000001011be039 in Parrot_P6opaque_clone ()
#8  0x0000000100a9cc06 in Parrot_clone_p_p (cur_opcode=0x101303b08, interp=0x101208890) at set.ops:474
#9  0x0000000100b98864 in runops_fast_core (interp=0x101208890, runcore=0x10121c2b0, pc=0x101303b08) at src/runcore/cores.c:670
#10 0x0000000100b9736c in runops_int (interp=0x101208890, offset=202378) at src/runcore/main.c:549
#11 0x0000000100b5ad92 in runops (interp=0x101208890, offs=202378) at src/call/ops.c:112
#12 0x0000000100b5049e in Parrot_pcc_invoke_from_sig_object (interp=0x101208890, sub_obj=0x10256f868, call_object=0x1016f9f98) at src/call/pcc.c:314
#13 0x0000000100b50652 in Parrot_pcc_invoke_sub_from_c_args (interp=0x101208890, sub_obj=0x10256f868, sig=0x100d5cb7a ""P->"") at src/call/pcc.c:75
#14 0x0000000100b33c36 in Parrot_runcode (interp=0x101208890, argc=2, argv=0x7fff5fbff810) at src/embed.c:826
#15 0x0000000100000d69 in main ()
}}}

The line in imageio.pmc calls the VTABLE_push_pmc macro, which expands to a function pointer call to the push_pmc member in the vtable of info->todo, which is NULL in this case."	bug	closed	normal		none		medium	fixed			perl6		darwin