From 42bfcaa2d4371b7a1312848c0f5f6cfefcaaa9cb Mon Sep 17 00:00:00 2001
From: Andrew Murray <radarhere@users.noreply.github.com>
Date: Sat, 13 Jul 2024 12:46:15 +1000
Subject: [PATCH] When IFD is missing, connect get_ifd() dictionary to Exif

---
 Tests/test_image.py | 8 ++++++++
 src/PIL/Image.py    | 2 +-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/Tests/test_image.py b/Tests/test_image.py
index 4fdc41791..77be58261 100644
--- a/Tests/test_image.py
+++ b/Tests/test_image.py
@@ -769,6 +769,14 @@ class TestImage:
         exif.load(b"Exif\x00\x00")
         assert not dict(exif)
 
+    def test_empty_get_ifd(self) -> None:
+        exif = Image.Exif()
+        ifd = exif.get_ifd(0x8769)
+        assert ifd == {}
+
+        ifd[36864] = b"0220"
+        assert exif.get_ifd(0x8769) == {36864: b"0220"}
+
     @mark_if_feature_version(
         pytest.mark.valgrind_known_error, "libjpeg_turbo", "2.0", reason="Known Failing"
     )
diff --git a/src/PIL/Image.py b/src/PIL/Image.py
index 565abe71d..9a3e4efa4 100644
--- a/src/PIL/Image.py
+++ b/src/PIL/Image.py
@@ -4073,7 +4073,7 @@ class Exif(_ExifBase):
                 else:
                     # Interop
                     self._ifds[tag] = self._get_ifd_dict(tag_data, tag)
-        ifd = self._ifds.get(tag, {})
+        ifd = self._ifds.setdefault(tag, {})
         if tag == ExifTags.IFD.Exif and self._hidden_data:
             ifd = {
                 k: v