From b7055aeaba454ef94fa304757491cac13abd3913 Mon Sep 17 00:00:00 2001
From: Aarni Koskela <akx@iki.fi>
Date: Wed, 22 Feb 2023 10:36:10 +0200
Subject: [PATCH] IcoImagePlugin: raise specific exception like CurImagePlugin
 if no images

---
 Tests/images/no_icons.ico | Bin 0 -> 6 bytes
 Tests/test_file_ico.py    |   5 +++++
 src/PIL/IcoImagePlugin.py |   4 ++++
 3 files changed, 9 insertions(+)
 create mode 100644 Tests/images/no_icons.ico

diff --git a/Tests/images/no_icons.ico b/Tests/images/no_icons.ico
new file mode 100644
index 0000000000000000000000000000000000000000..4012786aaf7d31ccf7f963c14aae96e0b80b9f39
GIT binary patch
literal 6
NcmZQzU}Rum0000A00IC2

literal 0
HcmV?d00001

diff --git a/Tests/test_file_ico.py b/Tests/test_file_ico.py
index 9c1c3cf17..6c7303b6e 100644
--- a/Tests/test_file_ico.py
+++ b/Tests/test_file_ico.py
@@ -229,3 +229,8 @@ def test_draw_reloaded(tmp_path):
 
     with Image.open(outfile) as im:
         assert_image_equal_tofile(im, "Tests/images/hopper_draw.ico")
+
+
+def test_empty():
+    with pytest.raises(SyntaxError, match="No images were found"):
+        IcoImagePlugin.IcoImageFile("Tests/images/no_icons.ico")
diff --git a/src/PIL/IcoImagePlugin.py b/src/PIL/IcoImagePlugin.py
index a188f8fdc..5de561782 100644
--- a/src/PIL/IcoImagePlugin.py
+++ b/src/PIL/IcoImagePlugin.py
@@ -172,6 +172,10 @@ class IcoFile:
 
             self.entry.append(icon_header)
 
+        if not self.entry:
+            msg = "No images were found"
+            raise TypeError(msg)
+
         self.entry = sorted(self.entry, key=lambda x: x["color_depth"])
         # ICO images are usually squares
         # self.entry = sorted(self.entry, key=lambda x: x['width'])