panics when deleting from empty buffer about helix HOT 1 CLOSED

$ RUST_BACKTRACE=1 hx
thread 'main' panicked at 'Attempt to slice past end of RopeSlice: slice end 1, RopeSlice length 0', /home/elias/.cargo/registry/src/github.com-1ecc6299db9ec823/ropey-1.2.0/src/slice.rs:784:9
stack backtrace:
   0: rust_begin_unwind
             at /rustc/9bc8c42bb2f19e745a63f3445f1ac248fb015e53/library/std/src/panicking.rs:493:5
   1: std::panicking::begin_panic_fmt
             at /rustc/9bc8c42bb2f19e745a63f3445f1ac248fb015e53/library/std/src/panicking.rs:435:5
   2: ropey::slice::RopeSlice::slice
   3: <core::iter::adapters::map::Map<I,F> as core::iter::traits::iterator::Iterator>::fold
   4: hx::commands::_delete_selection
   5: hx::commands::delete_selection
   6: <hx::ui::editor::EditorView as hx::compositor::Component>::handle_event
   7: <core::future::from_generator::GenFuture<T> as core::future::future::Future>::poll
   8: tokio::runtime::enter::Enter::block_on
   9: tokio::runtime::Runtime::block_on
  10: hx::main
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.