`CTRL+c` causes Helix to crash after Nushell LSP crashes

[cotneit]

Summary

After Nushell LSP crashes, pressing CTRL+c causes Helix to crash.

Related Nushell LSP issue: https://github.com/nushell/nushell/issues/13582

Reproduction Steps

Press CTRL+c after Nushell LSP crashes, reproducible in both INSERT and NORMAL modes

LSP crash repro:

1. Have Nushell 0.96.1 installed
2. Create a .nu file with contents 'бана яблук' (these are fragments of two words in Ukrainian, I played around with removing characters and this is the minimal reproduction case I came up with)
3. Open this file with Helix
4. Add a newline and type echo , with this example LSP crashes after entering ec

See https://github.com/nushell/nushell/issues/13582 for details

Helix log

~/.cache/helix/helix.log

Only LSP crash is caught in logs

2024-08-10T02:44:29.468 helix_lsp::transport [ERROR] nu-lsp err <- "Error:   × Main thread panicked.\n"
2024-08-10T02:44:29.469 helix_lsp::transport [ERROR] nu-lsp err <- "  ├─▶ at crates\\nu-lsp\\src\\lib.rs:557:69\n"
2024-08-10T02:44:29.469 helix_lsp::transport [ERROR] nu-lsp err <- "  ╰─▶ byte index 15 is not a char boundary; it is inside 'л' (bytes 14..16) of\n"
2024-08-10T02:44:29.469 helix_lsp::transport [ERROR] nu-lsp err <- "      `'бана яблук'\n"
2024-08-10T02:44:29.469 helix_lsp::transport [ERROR] nu-lsp err <- "      ec\n"
2024-08-10T02:44:29.469 helix_lsp::transport [ERROR] nu-lsp err <- "      `\n"
2024-08-10T02:44:29.469 helix_lsp::transport [ERROR] nu-lsp err <- "  help: set the `RUST_BACKTRACE=1` environment variable to display a\n"
2024-08-10T02:44:29.469 helix_lsp::transport [ERROR] nu-lsp err <- "        backtrace.\n"
2024-08-10T02:44:29.469 helix_lsp::transport [ERROR] nu-lsp err <- "\n"
2024-08-10T02:44:29.474 helix_lsp::transport [ERROR] nu-lsp err: <- StreamClosed

Platform

Windows

Terminal Emulator

Windows Terminal 1.20.11781.0, wezterm 20240203-110809-5046fc22

Installation Method

source

Helix Version

24.07-137-g91e642ce