X86-64 architecture program decompile error

[ioo0s]

When using code code = [15, 31, 128, 0, 0, 0, 0] in sleighcraft and set MODE_64, We will get an error BadDataError.

crash demo

  let mut sleigh_builder = SleighBuilder::default();
    let spec = arch("x86-64").unwrap();
    let buf = [15, 31, 128, 0, 0, 0, 0];
    let mut loader = PlainLoadImage::from_buf(&buf, 0);
    sleigh_builder.loader(&mut loader);
    sleigh_builder.spec(spec);
    sleigh_builder.mode(MODE64);
    let mut asm_emit = CollectingAssemblyEmit::default();
    let mut pcode_emit = CollectingPcodeEmit::default();
    sleigh_builder.asm_emit(&mut asm_emit);
    sleigh_builder.pcode_emit(&mut pcode_emit);
    let mut sleigh = sleigh_builder.try_build().unwrap();

    sleigh.decode(0).unwrap();

    println!("{:?}", asm_emit.asms);
    println!("{:?}", pcode_emit.pcode_asms);

But using capstone is normal