crop() with multi-band format

Tests/test_file_tiff.py

@@ -877,11 +877,18 @@ class TestFileTiff:
     def test_open_tiff_uint16_multiband(self):
         """Test opening multiband TIFFs and reading all channels."""
 
-        def getpixel00(im: Image.Image):
+        def check_pixel(im: Image.Image, expected_pixel, pos: tuple[int, int]):
             actual_pixel = im.getpixel((0, 0))
             if isinstance(actual_pixel, int):
                 actual_pixel = (actual_pixel,)
-            return actual_pixel
+            assert actual_pixel == expected_pixel
+
+        def check_image(im: Image.Image, width: int, height: int, expected_pixel):
+            assert im.width == width
+            assert im.height == height
+            for x in range(im.width):
+                for y in range(im.height):
+                    check_pixel(im, expected_pixel, (x, y))
 
         base_value = 4660
         for i in range(1, 6):
@@ -890,10 +897,13 @@ class TestFileTiff:
             im = Image.open(infile)
 
             im.load()
-            assert getpixel00(im) == pixel
+            check_image(im, 10, 10, pixel)
 
-            im.copy()
+            im1 = im.copy()
-            assert getpixel00(im) == pixel
+            check_image(im1, 10, 10, pixel)
+
+            im2 = im.crop((2, 2, 7, 7))
+            check_image(im2, 5, 5, pixel)
 
 
 @pytest.mark.skipif(not is_win32(), reason="Windows only")

src/libImaging/Crop.c

@@ -37,7 +37,8 @@ ImagingCrop(Imaging imIn, int sx0, int sy0, int sx1, int sy1) {
         ysize = 0;
     }
 
-    imOut = ImagingNewDirty(imIn->mode, (ImagingNewParams){xsize, ysize});
+    imOut = ImagingNewDirty(
+        imIn->mode, (ImagingNewParams){xsize, ysize, imIn->depth, imIn->bands});
     if (!imOut) {
         return NULL;
     }