Restore out-of-bound integer support in gray2rgba

python/cucim/src/cucim/skimage/color/colorconv.py

@@ -1121,10 +1121,13 @@ def gray2rgba(image, alpha=None, *, channel_axis=-1, check_alpha=True):
  _, alpha = dtype_limits(image, clip_negative=False)
 
  if np.isscalar(alpha):
+ # Convert to NumPy. As of NumPy 2.1 (and cupy 13.3) `cp.full`
+ # will raise for out-of-bound Python integers otherwise.
+ alpha = np.asarray(alpha)
  if check_alpha:
  # do not use np.can_cast here for NumPy 2.0 compatibility
  with np.errstate(over="ignore", under="ignore"):
- alpha_cast = np.asarray(alpha).astype(image.dtype)
+ alpha_cast = alpha.astype(image.dtype)
  if alpha_cast != alpha:
  warn(
  'alpha cannot be safely cast to image dtype '