From e62cf67be574c8cbab84720b60a895ccb9c1816d Mon Sep 17 00:00:00 2001
From: Matt-Yorkley <9029026+Matt-Yorkley@users.noreply.github.com>
Date: Sun, 28 Feb 2021 20:41:47 +0000
Subject: [PATCH] Add more defensive code in TaxRateFinder

---
 app/services/tax_rate_finder.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/services/tax_rate_finder.rb b/app/services/tax_rate_finder.rb
index f27a42ef85..01b955d3d0 100644
--- a/app/services/tax_rate_finder.rb
+++ b/app/services/tax_rate_finder.rb
@@ -75,7 +75,7 @@ class TaxRateFinder
   # to the included tax.
   def find_closest_tax_rates_from_included_tax(amount, included_tax)
     approximation = (included_tax / (amount - included_tax))
-    return [] if approximation.infinite? || approximation.zero?
+    return [] if approximation.infinite? || approximation.zero? || approximation.nan?
 
     [Spree::TaxRate.order("ABS(amount - #{approximation})").first]
   end