From 78e971913ce9db7c5a4749fc1a22f901b44c5e9e 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 | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/PIL/TiffImagePlugin.py b/src/PIL/TiffImagePlugin.py
index 018789abf..ea88ef0f7 100644
--- a/src/PIL/TiffImagePlugin.py
+++ b/src/PIL/TiffImagePlugin.py
@@ -353,7 +353,13 @@ class IFDRational(Rational):
         return self._val.__hash__()
 
     def __eq__(self, other):
-        return self._val == 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
+            return self._val == other._val
+        else:
+            return self._val == other
 
     def _delegate(op):
         def delegate(self, *args):