From b68e0e17c720f686a9804e29659719b8f54c6cda Mon Sep 17 00:00:00 2001
From: Andrew Murray <radarhere@users.noreply.github.com>
Date: Tue, 7 Apr 2020 19:53:35 +1000
Subject: [PATCH 1/3] Raise DeprecationWarning on raise_ioerror

---
 Tests/test_imagefile.py |  5 +++++
 src/PIL/ImageFile.py    | 10 ++++++++++
 2 files changed, 15 insertions(+)

diff --git a/Tests/test_imagefile.py b/Tests/test_imagefile.py
index e2b52857d57..649b0ac9b1d 100644
--- a/Tests/test_imagefile.py
+++ b/Tests/test_imagefile.py
@@ -93,6 +93,11 @@ def test_safeblock(self):
 
         assert_image_equal(im1, im2)
 
+    def test_raise_ioerror(self):
+        with pytest.raises(IOError):
+            with pytest.raises(DeprecationWarning):
+                ImageFile.raise_ioerror(1)
+
     def test_raise_oserror(self):
         with pytest.raises(OSError):
             ImageFile.raise_oserror(1)
diff --git a/src/PIL/ImageFile.py b/src/PIL/ImageFile.py
index 2177dbf5255..8637a47f953 100644
--- a/src/PIL/ImageFile.py
+++ b/src/PIL/ImageFile.py
@@ -30,6 +30,7 @@
 import io
 import struct
 import sys
+import warnings
 
 from . import Image
 from ._util import isPath
@@ -64,6 +65,15 @@ def raise_oserror(error):
     raise OSError(message + " when reading image file")
 
 
+def raise_ioerror(error):
+    warnings.warn(
+        "raise_ioerror is deprecated and will be removed in a future release. "
+        "Use raise_oserror instead.",
+        DeprecationWarning,
+    )
+    return raise_oserror(error)
+
+
 def _tilesort(t):
     # sort on offset
     return t[2]

From 9b01826154d51262d10103f7ac430650b432edeb Mon Sep 17 00:00:00 2001
From: Andrew Murray <radarhere@users.noreply.github.com>
Date: Tue, 7 Apr 2020 20:39:40 +1000
Subject: [PATCH 2/3] ImageFile.raise_ioerror is now deprecated [ci skip]

---
 docs/deprecations.rst | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/docs/deprecations.rst b/docs/deprecations.rst
index 227a5bc823e..350a6002c12 100644
--- a/docs/deprecations.rst
+++ b/docs/deprecations.rst
@@ -12,6 +12,15 @@ Deprecated features
 Below are features which are considered deprecated. Where appropriate,
 a ``DeprecationWarning`` is issued.
 
+ImageFile.raise_ioerror
+~~~~~~~~~~~~~~~~~~~~~~~
+
+.. deprecated:: 7.2.0
+
+IOError was merged into OSError in Python 3.3. So, ``ImageFile.raise_ioerror``
+is now deprecated and will be removed in a future released. Use
+``ImageFile.raise_oserror`` instead.
+
 PILLOW_VERSION constant
 ~~~~~~~~~~~~~~~~~~~~~~~
 

From 7de4a85e315256b1c4bfa5ea6b431f19a49218a0 Mon Sep 17 00:00:00 2001
From: Andrew Murray <3112309+radarhere@users.noreply.github.com>
Date: Tue, 7 Apr 2020 22:59:18 +1000
Subject: [PATCH 3/3] Highlighted errors [ci skip]

Co-Authored-By: Hugo van Kemenade <hugovk@users.noreply.github.com>
---
 docs/deprecations.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/deprecations.rst b/docs/deprecations.rst
index 350a6002c12..203921c0b84 100644
--- a/docs/deprecations.rst
+++ b/docs/deprecations.rst
@@ -17,7 +17,7 @@ ImageFile.raise_ioerror
 
 .. deprecated:: 7.2.0
 
-IOError was merged into OSError in Python 3.3. So, ``ImageFile.raise_ioerror``
+``IOError`` was merged into ``OSError`` in Python 3.3. So, ``ImageFile.raise_ioerror``
 is now deprecated and will be removed in a future released. Use
 ``ImageFile.raise_oserror`` instead.