From b5aaf0d527cdab794058ccbbf3cd5d215fd9a5af Mon Sep 17 00:00:00 2001
From: Joren Van Onder <jov@odoo.com>
Date: Mon, 21 Aug 2017 18:34:56 -0700
Subject: [PATCH] [FIX] point_of_sale: handle fiscal positions that remove
 taxes

A tax can be mapped to nothing, so first check if
_map_tax_fiscal_position actually returned something.

Fixes #17963
---
 addons/point_of_sale/static/src/js/models.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/addons/point_of_sale/static/src/js/models.js b/addons/point_of_sale/static/src/js/models.js
index 5d7d96b5178..31c678e107c 100644
--- a/addons/point_of_sale/static/src/js/models.js
+++ b/addons/point_of_sale/static/src/js/models.js
@@ -1360,6 +1360,9 @@ exports.Orderline = Backbone.Model.extend({
             if (!no_map_tax){
                 tax = self._map_tax_fiscal_position(tax);
             }
+            if (!tax){
+                return;
+            }
             if (tax.amount_type === 'group'){
                 var ret = self.compute_all(tax.children_tax_ids, price_unit, quantity, currency_rounding);
                 total_excluded = ret.total_excluded;