From c6c1d7c11a6f6da87f4de9af894aa3d468666e5e Mon Sep 17 00:00:00 2001
From: luphord <luphord@protonmail.com>
Date: Fri, 24 Jul 2020 16:17:15 +0200
Subject: [PATCH] fix IFDRational equality

---
 src/PIL/TiffImagePlugin.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/PIL/TiffImagePlugin.py b/src/PIL/TiffImagePlugin.py
index cb925246d..9ca7bf1cd 100644
--- a/src/PIL/TiffImagePlugin.py
+++ b/src/PIL/TiffImagePlugin.py
@@ -354,6 +354,9 @@ class IFDRational(Rational):
 
     def __eq__(self, other):
         if isinstance(other, IFDRational):
+            if self.denominator == 0 and other.denominator == 0:
+                # in this case self._val and other._val would be NaN
+                return self.numerator == other.numerator
             other = other._val
         return self._val == other