gdk:cursor-fallback (object)

object -- a gdk:cursor object
fallback -- a gdk:cursor object for the fallback of the cursor or nil to use the default cursor as fallback

The accessor for the fallback slot of the gdk:cursor class returns the fallback for cursor. The fallback will be used if the cursor is not available on a given gdk:display object.

For named cursors, this can happen when using nonstandard names or when using an incomplete cursor theme. For textured cursors, this can happen when the texture is too large or when the gdk:display object it is used on does not support textured cursors.