EOF ends not just the trailer, but also the file

Tests/test_file_eps.py

@@ -406,10 +406,16 @@ def test_timeout(test_file):
                 pass
 
 
-def test_boundary_box_in_trailer():
-    # Check whether boundary boxes are parsed in the same way
-    # when specified in the header or the trailer
+def test_bounding_box_in_trailer():
+    # Check bounding boxes are parsed in the same way
+    # when specified in the header and the trailer
     with Image.open("Tests/images/zero_bb_trailer.eps") as trailer_image, Image.open(
         FILE1
     ) as header_image:
         assert trailer_image.size == header_image.size
+
+
+def test_eof_before_bounding_box():
+    with pytest.raises(OSError):
+        with Image.open("Tests/images/zero_bb_eof_before_boundingbox.eps"):
+            pass

src/PIL/EpsImagePlugin.py

@@ -367,10 +367,9 @@ class EpsImageFile(ImageFile.ImageFile):
                 # Load EPS trailer
 
                 # if this line starts with "%%EOF",
-                # then we've reached the end of the trailer
+                # then we've reached the end of the file
                 if bytes_mv[:5] == b"%%EOF":
-                    reading_trailer_comments = False
-                    continue
+                    break
 
                 s = str(bytes_mv[:bytes_read], "latin-1")
                 _read_comment(s)