Crash while browsing workspace symbol picker

[eilvelia]

Edit https://github.com/prepor/ocaml-edn/blob/12e54ae9deefbbd69299b74f966724a231a50df4/src/edn.ml (happens on other projects too), press space S to open the picker, hold down, helix crashes closer to the end of the list.

$ nix shell github:helix-editor/helix
[…]
$ RUST_BACKTRACE=full hx src/edn.ml
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Line index out of bounds: line index 1904, Rope/RopeSlice line count 89', /nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-vendor-cargo-deps/c19b7c6f923b580ac259164a89f2577984ad5ab09ee9d583b888f934adbbe8d0/ropey-1.6.0/src/rope.rs:764:41
stack backtrace:
   0:        0x106e65c6b - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h9da7574d41a27793
   1:        0x1063a300b - core::fmt::write::h30e9018632f2aef2
   2:        0x106e6180e - std::io::Write::write_fmt::h56af08ec60343535
   3:        0x106e65a1a - std::sys_common::backtrace::print::h4d81fafe758cf4b8
   4:        0x106e6a855 - std::panicking::default_hook::{{closure}}::h120f229f25c70a74
   5:        0x106e6a625 - std::panicking::default_hook::hceec3dccba707793
   6:        0x106e6af52 - std::panicking::rust_panic_with_hook::h6683bf919d2bf510
   7:        0x106e6ac84 - std::panicking::begin_panic_handler::{{closure}}::h9ad2a0e8640ca3c3
   8:        0x106e68cb9 - std::sys_common::backtrace::__rust_end_short_backtrace::h1aa11996f1542333
   9:        0x106e6a9e2 - _rust_begin_unwind
  10:        0x106f40ca3 - core::panicking::panic_fmt::hb305629a540f8ae6
  11:        0x106f41135 - core::result::unwrap_failed::h1066469645d18ac3
  12:        0x1069d0870 - <helix_term::ui::picker::Picker<T> as helix_term::compositor::Component>::render::h74dc3964a5ed4ff5
  13:        0x106c14793 - helix_term::application::Application::render::{{closure}}::h691ee7993501402e
  14:        0x106c122f2 - helix_term::application::Application::run::{{closure}}::h3bf88bc37f9daf4b
  15:        0x106c29bca - tokio::runtime::context::blocking::BlockingRegionGuard::block_on::ha74a9e6857453a73
  16:        0x106c70b0f - tokio::runtime::context::runtime::enter_runtime::h66d441fd93e21d7f
  17:        0x106ca356d - tokio::runtime::runtime::Runtime::block_on::h5a44c645f53787f8
  18:        0x106bfd621 - hx::main::h3b3529f11a9265e6
  19:        0x106c1d256 - std::sys_common::backtrace::__rust_begin_short_backtrace::h57e60ee102d15a04
  20:        0x106c1d541 - std::rt::lang_start::{{closure}}::hb63f915239eaf79d
  21:        0x106e5b654 - std::rt::lang_start_internal::h2bb66f5226335a85
  22:        0x106bfd70c - _main

~/.cache/helix/helix.log

The log is too long for GitHub: https://pastebin.com/mPGhahyW

Platform

macOS, nix

Terminal Emulator

kitty 0.29.2

Helix Version

both helix master ccabfee3811bdcc8372beaae777a98fd36e2657e and helix 23.05 (7f5940be)

[pascalkuthe]

this is caused by the OCMAL LSP sending invalid symbols with ranges far past the end of the file.

For example:

{"deprecated":false,"kind":12,"location":{"range":{"end":{"character":59,"line":1900},"start":{"character":0,"line":1887}},"uri":"file:///home/pascalkuthe/git/ocaml-edn/src/edn_read.mll"},"name":"__ocaml_lex_read_comment_rec"}

was send by the server but edn_read.mll only has about 90 lines.

I will add some extra redundancy here so we at least won't crash but the best you will get here is <file not found>. This is ultimately a bug in the LS and should be reported to them.

[eilvelia]

Thanks, it looks like the lsp server reports symbols that are present in generated files and not in the actual source files. There are already some existing issues and PRs like https://github.com/ocaml/ocaml-lsp/pull/1097, I'll look into that. Nevertheless, fixing the panic would indeed be helpful so that even in the presence of invalid symbols I can fuzzy-search over the valid ones without randomly crashing if invalid one gets in the way. file not found is ok, since the symbols aren't really there anyway.

[pascalkuthe]

the panic is fixed in https://github.com/helix-editor/helix/pull/8265