re: port-macppc/58283: NetBSD/macppc 10.0 reproducible kernel PGM trap panic

[matthew green <mrg%eterna23.net@localhost>]

>  0x12cbc8 is 'dssall' in vec_state_release:

i think the bug here is that vec_restore_from_mcontext() is missing
this check that is in vec_save_to_mcontext():

	/* Save AltiVec context, if any. */
	if (!vec_used_p(l))
		return false;

can you try adding this near the top of vec_restore_from_mcontext()?
(with just return; void function.)


.mrg.