test.rs

fn exportPixels(&self) -> ~[RGB] {
  //Determine the size of the vector we need to allocate
	let mut pixel_buffer = vec::with_capacity::<self::RGB>(self.numPixels());
	unsafe {
		let buffer_ptr = vec::raw::to_ptr(pixel_buffer);
		wand_extern::MagickExportImagePixels(buffer_ptr);
		vec::raw::set_len::<RGB>(pixel_buffer, self.numPixels());
	}
	pixel_buffer
}
//wand.rs:125:28: 125:40 error: mismatched types: expected `&mut ~[RGB]` but found `~[RGB]` (expected &-ptr but found vector)
//wand.rs:125 			vec::raw::set_len::<RGB>(pixel_buffer, num_pixels);
            			                         ^~~~~~~~~~~~