From 45ae9317d8d24937b6e53db933bf9b0af356cf7d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Krier?= <ced@b2ck.com>
Date: Sat, 30 Oct 2021 02:07:55 +0200
Subject: [PATCH] Do not apply negative unit price after promotion

We must just set a unit price of 0.

issue10903
review377421002
(grafted from 0f2befb01e316a15a38ccd4edfbc33671c35cee0)

--HG--
branch : 6.0
---
 sale.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sale.py b/sale.py
index e1a37cbcd4..f341f6256a 100644
--- a/sale.py
+++ b/sale.py
@@ -298,6 +298,8 @@ class Promotion(
                 continue
             context = self.get_context_formula(line)
             new_price = self.get_unit_price(**context)
+            if new_price < 0:
+                new_price = Decimal(0)
             if line.unit_price >= new_price:
                 line.unit_price = round_price(new_price)
                 line.promotion = self