crash on small terminal size

[extrawurst]

[ERROR] panic: PanicInfo { payload: Any, message: Some(Trying to access position outside the buffer: x=0, y=2, area=Rect { x: 0, y: 0, width: 7, height: 2 }), location: Location { file: "/Users/stephan/.cargo/registry/src/git.colasdn.top-1ecc6299db9ec823/tui-0.9.5/src/buffer.rs", line: 245, col: 9 } }
trace:
   0: backtrace::backtrace::libunwind::trace
             at /Users/stephan/.cargo/registry/src/git.colasdn.top-1ecc6299db9ec823/backtrace-0.3.51/src/backtrace/libunwind.rs:100:5
      backtrace::backtrace::trace_unsynchronized
             at /Users/stephan/.cargo/registry/src/git.colasdn.top-1ecc6299db9ec823/backtrace-0.3.51/src/backtrace/mod.rs:66:5
   1: backtrace::backtrace::trace
             at /Users/stephan/.cargo/registry/src/git.colasdn.top-1ecc6299db9ec823/backtrace-0.3.51/src/backtrace/mod.rs:53:14
   2: backtrace::capture::Backtrace::create
             at /Users/stephan/.cargo/registry/src/git.colasdn.top-1ecc6299db9ec823/backtrace-0.3.51/src/capture.rs:176:9
   3: backtrace::capture::Backtrace::new
             at /Users/stephan/.cargo/registry/src/git.colasdn.top-1ecc6299db9ec823/backtrace-0.3.51/src/capture.rs:140:22
   4: gitui::set_panic_handlers::{{closure}}
             at src/main.rs:328:25
   5: std::panicking::rust_panic_with_hook
             at /rustc/04488afe34512aa4c33566eb16d8c912a3ae04f9/src/libstd/panicking.rs:530:17
   6: rust_begin_unwind
             at /rustc/04488afe34512aa4c33566eb16d8c912a3ae04f9/src/libstd/panicking.rs:437:5
   7: std::panicking::begin_panic_fmt
             at /rustc/04488afe34512aa4c33566eb16d8c912a3ae04f9/src/libstd/panicking.rs:391:5
   8: tui::buffer::Buffer::index_of
             at /Users/stephan/.cargo/registry/src/git.colasdn.top-1ecc6299db9ec823/tui-0.9.5/src/buffer.rs:245:9
   9: tui::buffer::Buffer::get_mut
             at /Users/stephan/.cargo/registry/src/git.colasdn.top-1ecc6299db9ec823/tui-0.9.5/src/buffer.rs:212:17
  10: tui::buffer::Buffer::set_background
             at /Users/stephan/.cargo/registry/src/git.colasdn.top-1ecc6299db9ec823/tui-0.9.5/src/buffer.rs:349:17
  11: <tui::widgets::paragraph::Paragraph<T> as tui::widgets::Widget>::render
             at /Users/stephan/.cargo/registry/src/git.colasdn.top-1ecc6299db9ec823/tui-0.9.5/src/widgets/paragraph.rs:122:9
  12: tui::terminal::Frame<B>::render_widget
             at /Users/stephan/.cargo/registry/src/git.colasdn.top-1ecc6299db9ec823/tui-0.9.5/src/terminal.rs:65:9
  13: gitui::cmdbar::CommandBar::draw
             at src/cmdbar.rs:174:13
  14: gitui::app::App::draw
             at src/app.rs:178:9
  15: gitui::draw::{{closure}}
             at src/main.rs:189:25
  16: tui::terminal::Terminal<B>::draw
             at /Users/stephan/.cargo/registry/src/git.colasdn.top-1ecc6299db9ec823/tui-0.9.5/src/terminal.rs:187:9
  17: gitui::draw
             at src/main.rs:188:5
  18: gitui::main
             at src/main.rs:154:13
  19: std::rt::lang_start::{{closure}}
             at /Users/stephan/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/src/rust/src/libstd/rt.rs:67:34
  20: std::rt::lang_start_internal::{{closure}}
             at /rustc/04488afe34512aa4c33566eb16d8c912a3ae04f9/src/libstd/rt.rs:52:13
      std::panicking::try::do_call
             at /rustc/04488afe34512aa4c33566eb16d8c912a3ae04f9/src/libstd/panicking.rs:348:40
      std::panicking::try
             at /rustc/04488afe34512aa4c33566eb16d8c912a3ae04f9/src/libstd/panicking.rs:325:15
      std::panic::catch_unwind
             at /rustc/04488afe34512aa4c33566eb16d8c912a3ae04f9/src/libstd/panic.rs:394:14
      std::rt::lang_start_internal
             at /rustc/04488afe34512aa4c33566eb16d8c912a3ae04f9/src/libstd/rt.rs:51:25
  21: std::rt::lang_start
             at /Users/stephan/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/src/rust/src/libstd/rt.rs:67:5
  22: _main