leaky_subr_caller
leaky_subr_caller(lhs->lkb_stack, lhs->lkb_depth, lbuf, &lcaller);
leaky_subr_caller(rhs->lkb_stack, lhs->lkb_depth, rbuf, &rcaller);
leaky_subr_caller(lkb->lkb_stack, lkb->lkb_depth,
leaky_subr_caller(lkb->lkb_stack, lkb->lkb_depth,
leaky_subr_caller(lkb->lkb_stack, lkb->lkb_depth, c,
leaky_subr_caller(lhs->lkb_stack, lhs->lkb_depth, lbuf, &lcaller);
leaky_subr_caller(rhs->lkb_stack, lhs->lkb_depth, rbuf, &rcaller);
leaky_subr_caller(lkb->lkb_stack, lkb->lkb_depth,