Panic when opening highlight.js

[vv9k]

Reproduction steps

1. Run with cargo r
2. Open file picker f
3. Try to open highlight.js

Environment

• Platform: Linux
• Helix version: v0.2.1-60-g28d9673

backtrace

please provide a copy of `~/.cache/helix/helix.log` here if possible, you may need to redact some of the lines
helix on  master [$⇡] via 🦀 v1.53.0
❯ RUST_BACKTRACE=1 cargo r
   Compiling helix-lsp v0.2.0 (/home/wojtek/dev/rust/helix/helix-lsp)
   Compiling helix-view v0.2.0 (/home/wojtek/dev/rust/helix/helix-view)
   Compiling helix-term v0.2.0 (/home/wojtek/dev/rust/helix/helix-term)
    Finished dev [unoptimized + debuginfo] target(s) in 7.27s
     Running `target/debug/hx`
thread 'main' panicked at 'attempt to add with overflow', helix-term/src/ui/editor.rs:200:33
stack backtrace:
   0: rust_begin_unwind
             at /rustc/53cb7b09b00cbea8754ffb78e7e3cb521cb8af4b/library/std/src/panicking.rs:493:5
   1: core::panicking::panic_fmt
             at /rustc/53cb7b09b00cbea8754ffb78e7e3cb521cb8af4b/library/core/src/panicking.rs:92:14
   2: core::panicking::panic
             at /rustc/53cb7b09b00cbea8754ffb78e7e3cb521cb8af4b/library/core/src/panicking.rs:50:5
   3: helix_term::ui::editor::EditorView::render_buffer
             at ./helix-term/src/ui/editor.rs:200:33
   4: helix_term::ui::editor::EditorView::render_view
             at ./helix-term/src/ui/editor.rs:70:9
   5: <helix_term::ui::editor::EditorView as helix_term::compositor::Component>::render
             at ./helix-term/src/ui/editor.rs:722:13
   6: helix_term::compositor::Compositor::render
             at ./helix-term/src/compositor.rs:138:13
   7: helix_term::application::Application::render
             at ./helix-term/src/application.rs:132:9
   8: helix_term::application::Application::handle_terminal_events
             at ./helix-term/src/application.rs:191:13
   9: helix_term::application::Application::event_loop::{{closure}}
             at ./helix-term/src/application.rs:149:21
  10: <core::future::from_generator::GenFuture<T> as core::future::future::Future>::poll
             at /home/wojtek/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/future/mod.rs:80:19
  11: helix_term::application::Application::run::{{closure}}
             at ./helix-term/src/application.rs:441:9
  12: <core::future::from_generator::GenFuture<T> as core::future::future::Future>::poll
             at /home/wojtek/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/future/mod.rs:80:19
  13: hx::main::{{closure}}
             at ./helix-term/src/main.rs:103:5
  14: <core::future::from_generator::GenFuture<T> as core::future::future::Future>::poll
             at /home/wojtek/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/future/mod.rs:80:19
  15: tokio::park::thread::CachedParkThread::block_on::{{closure}}
             at /home/wojtek/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.6.1/src/park/thread.rs:263:54
  16: tokio::coop::with_budget::{{closure}}
             at /home/wojtek/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.6.1/src/coop.rs:106:9
  17: std::thread::local::LocalKey<T>::try_with
             at /home/wojtek/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/thread/local.rs:376:16
  18: std::thread::local::LocalKey<T>::with
             at /home/wojtek/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/thread/local.rs:352:9
  19: tokio::coop::with_budget
             at /home/wojtek/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.6.1/src/coop.rs:99:5
  20: tokio::coop::budget
             at /home/wojtek/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.6.1/src/coop.rs:76:5
  21: tokio::park::thread::CachedParkThread::block_on
             at /home/wojtek/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.6.1/src/park/thread.rs:263:31
  22: tokio::runtime::enter::Enter::block_on
             at /home/wojtek/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.6.1/src/runtime/enter.rs:151:13
  23: tokio::runtime::thread_pool::ThreadPool::block_on
             at /home/wojtek/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.6.1/src/runtime/thread_pool/mod.rs:71:9
  24: tokio::runtime::Runtime::block_on
             at /home/wojtek/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.6.1/src/runtime/mod.rs:452:43
  25: hx::main
             at ./helix-term/src/main.rs:105:5
  26: core::ops::function::FnOnce::call_once
             at /home/wojtek/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ops/function.rs:227:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.