character() crash

[youknowone]

           let mut s = String::new();
            for _ in 0..100 {
                s.push('x');
            }
            unicode_names2::character(&s)

hread 'main' panicked at 'range end index 100 out of range for slice of length 89', library/core/src/slice/index.rs:73:5
stack backtrace:
   0: rust_begin_unwind
             at /rustc/e092d0b6b43f2de967af0887873151bb1c0b18d3/library/std/src/panicking.rs:584:5
   1: core::panicking::panic_fmt
             at /rustc/e092d0b6b43f2de967af0887873151bb1c0b18d3/library/core/src/panicking.rs:142:14
   2: core::slice::index::slice_end_index_len_fail_rt
             at /rustc/e092d0b6b43f2de967af0887873151bb1c0b18d3/library/core/src/slice/index.rs:73:5
   3: core::ops::function::FnOnce::call_once
             at /rustc/e092d0b6b43f2de967af0887873151bb1c0b18d3/library/core/src/ops/function.rs:248:5
   4: core::intrinsics::const_eval_select
             at /rustc/e092d0b6b43f2de967af0887873151bb1c0b18d3/library/core/src/intrinsics.rs:2372:5
   5: core::slice::index::slice_end_index_len_fail
             at /rustc/e092d0b6b43f2de967af0887873151bb1c0b18d3/library/core/src/slice/index.rs:67:9
   6: <core::ops::range::Range<usize> as core::slice::index::SliceIndex<[T]>>::index
             at /rustc/e092d0b6b43f2de967af0887873151bb1c0b18d3/library/core/src/slice/index.rs:304:13
   7: <core::ops::range::RangeTo<usize> as core::slice::index::SliceIndex<[T]>>::index
             at /rustc/e092d0b6b43f2de967af0887873151bb1c0b18d3/library/core/src/slice/index.rs:351:9
   8: core::slice::index::<impl core::ops::index::Index<I> for [T]>::index
             at /rustc/e092d0b6b43f2de967af0887873151bb1c0b18d3/library/core/src/slice/index.rs:18:9
   9: core::array::<impl core::ops::index::Index<I> for [T; N]>::index
             at /rustc/e092d0b6b43f2de967af0887873151bb1c0b18d3/library/core/src/array/mod.rs:288:9
  10: unicode_names2::character
             at /opt/cargo/registry/src/github.com-1ecc6299db9ec823/unicode_names2-0.5.0/src/lib.rs:323:24