Merge pull request #7266 from mtreinish/handle-repr-exceptions

Handle exceptions in _repr_jpeg_ and _repr_png_

Tests/test_file_jpeg.py

@@ -929,11 +929,10 @@ class TestFileJpeg:
             assert repr_jpeg.format == "JPEG"
             assert_image_similar(im, repr_jpeg, 17)
 
-    def test_repr_jpeg_error(self):
+    def test_repr_jpeg_error_returns_none(self):
         im = hopper("F")
 
-        with pytest.raises(ValueError):
-            im._repr_jpeg_()
+        assert im._repr_jpeg_() is None
 
 
 @pytest.mark.skipif(not is_win32(), reason="Windows only")

Tests/test_file_png.py

@@ -532,11 +532,10 @@ class TestFilePng:
             assert repr_png.format == "PNG"
             assert_image_equal(im, repr_png)
 
-    def test_repr_png_error(self):
+    def test_repr_png_error_returns_none(self):
         im = hopper("F")
 
-        with pytest.raises(ValueError):
-            im._repr_png_()
+        assert im._repr_png_() is None
 
     def test_chunk_order(self, tmp_path):
         with Image.open("Tests/images/icc_profile.png") as im:

src/PIL/Image.py

@@ -641,9 +641,8 @@ class Image:
         b = io.BytesIO()
         try:
             self.save(b, image_format, **kwargs)
-        except Exception as e:
-            msg = f"Could not save to {image_format} for display"
-            raise ValueError(msg) from e
+        except Exception:
+            return None
         return b.getvalue()
 
     def _repr_png_(self):