287     buf->b_ml.ml_stack_top = 0;	// nothing in the stack  in ml_open()
543 	buf->b_ml.ml_stack_top = 0;  in ml_set_crypt_key()
611 	    if (buf->b_ml.ml_stack_top == 0)	// finished  in ml_set_crypt_key()
615 	    ip = &(buf->b_ml.ml_stack[--(buf->b_ml.ml_stack_top)]);  in ml_set_crypt_key()
1250     buf->b_ml.ml_stack_top = 0;		// nothing in the stack  in ml_recover()
1495     buf->b_ml.ml_stack_top = 0;  in ml_recover()
1666 	if (buf->b_ml.ml_stack_top == 0)	// finished  in ml_recover()
1672 	ip = &(buf->b_ml.ml_stack[--(buf->b_ml.ml_stack_top)]);  in ml_recover()
2501     buf->b_ml.ml_stack_top = 0;  in ml_preserve()
2533 	buf->b_ml.ml_stack_top = 0;	    // stack is invalid now  in ml_preserve()
3106 	for (stack_idx = buf->b_ml.ml_stack_top - 1; stack_idx >= 0;  in ml_append_int()
3145 		buf->b_ml.ml_stack_top = stack_idx + 1;	    // truncate stack  in ml_append_int()
3149 		    --(buf->b_ml.ml_stack_top);  in ml_append_int()
3153 		    buf->b_ml.ml_stack[buf->b_ml.ml_stack_top].ip_high +=  in ml_append_int()
3155 		    ++(buf->b_ml.ml_stack_top);  in ml_append_int()
3259 	    buf->b_ml.ml_stack_top = 0;	// invalidate stack  in ml_append_int()
3704 	for (stack_idx = buf->b_ml.ml_stack_top - 1; stack_idx >= 0;  in ml_delete_int()
3707 	    buf->b_ml.ml_stack_top = 0;	    // stack is invalid when failing  in ml_delete_int()
3729 		buf->b_ml.ml_stack_top = stack_idx;	// truncate stack  in ml_delete_int()
3734 		    buf->b_ml.ml_stack[buf->b_ml.ml_stack_top].ip_high +=  in ml_delete_int()
3737 		++(buf->b_ml.ml_stack_top);  in ml_delete_int()
4192 	for (top = buf->b_ml.ml_stack_top - 1; top >= 0; --top)  in ml_find_line()
4200 		buf->b_ml.ml_stack_top = top;	// truncate stack at prev entry  in ml_find_line()
4205 	    buf->b_ml.ml_stack_top = 0;		// not found, start at the root  in ml_find_line()
4208 	buf->b_ml.ml_stack_top = 0;	// start at the root  in ml_find_line()
4317     buf->b_ml.ml_stack_top = 0;  in ml_find_line()
4332     top = buf->b_ml.ml_stack_top;  in ml_add_stack()
4350     buf->b_ml.ml_stack_top++;  in ml_add_stack()
4373     for (idx = buf->b_ml.ml_stack_top - 1; idx >= 0; --idx)  in ml_lineadd()