potion_sig_at     863 core/potion.h  PN potion_sig_at(Potion *, PN, int);
potion_sig_at    1004 core/vm-x86.c  	PN sig = potion_sig_at(P, c->sig, i-2);
potion_sig_at     175 core/vm.c            PN s = potion_sig_at(P, f->sig, i);
potion_sig_at     819 core/vm.c                        PN s = potion_sig_at(P, sig, i);
potion_sig_at     844 core/vm.c                        PN s = potion_sig_at(P, sig, i);