missing field range

[max397574]

I'm getting this return value from a code action request:

{ {
    error = {
      code = -32602,
      message = "Failed to deserialize textDocument/codeAction: missing field `range`; {\"range\":{\"start\":{\"line\":11,\"character\":4},\"end\":{\"line\":11,\"character\":4}},\"context\":{\"diagnostics\":[{\"end_col\":61,\"severity\":1,\"bufnr\":1,\"end_lnum\":11,\"code\":\"E0381\",\"col\":4,\"namespace\":33,\"lnum\":11,\"message\":\"used binding `options` isn't initialized\\n`options` used here but it isn't initialized\",\"user_data\":{\"lsp\":{\"codeDescription\":{\"href\":\"https://doc.rust-lang.org/error-index.html#E0381\"},\"relatedInformation\":[{\"message\":\"binding declared here but left uninitialized\",\"location\":{\"uri\":\"file:///Users/max/programming/rust/algorithms/src/fuzzy.rs\",\"range\":{\"start\":{\"line\":10,\"character\":8},\"end\":{\"line\":10,\"character\":15}}}},{\"message\":\"consider assigning a value: ` = vec![]`\",\"location\":{\"uri\":\"file:///Users/max/programming/rust/algorithms/src/fuzzy.rs\",\"range\":{\"start\":{\"line\":10,\"character\":25},\"end\":{\"line\":10,\"character\":25}}}}],\"code\":\"E0381\"}},\"source\":\"rustc\"}]},\"textDocument\":{\"uri\":\"file:///Users/max/programming/rust/algorithms/src/fuzzy.rs\"}}",
      <metatable> = {
        __tostring = <function 1>
      }
    }
  } }

even though there is a range field

[lnicola]

Which client is that from? Does it reproduce reliably?

The request looks fine as far as I can tell..

[max397574]

it's from neovim
I'll try to make sth to reproduce it

[max397574]

I'm not sure if some things could be removed (not very good with rust yet)
The error:

{ {
    error = {
      code = -32602,
      message = "Failed to deserialize textDocument/codeAction: missing field `range`; {\"textDocument\":{\"uri\":\"file:///Users/max/programming/rust/algorithms/src/fuzzy.rs\"},\"context\":{\"diagnostics\":[{\"end_col\":33,\"code\":\"E0381\",\"message\":\"used binding `options` isn't initialized\\n`options` used here but it isn't initialized\",\"namespace\":33,\"bufnr\":1,\"severity\":1,\"lnum\":16,\"col\":19,\"end_lnum\":16,\"user_data\":{\"lsp\":{\"codeDescription\":{\"href\":\"https://doc.rust-lang.org/error-index.html#E0381\"},\"relatedInformation\":[{\"location\":{\"range\":{\"start\":{\"line\":15,\"character\":8},\"end\":{\"line\":15,\"character\":15}},\"uri\":\"file:///Users/max/programming/rust/algorithms/src/fuzzy.rs\"},\"message\":\"binding declared here but left uninitialized\"},{\"location\":{\"range\":{\"start\":{\"line\":15,\"character\":25},\"end\":{\"line\":15,\"character\":25}},\"uri\":\"file:///Users/max/programming/rust/algorithms/src/fuzzy.rs\"},\"message\":\"consider assigning a value: ` = vec![]`\"}],\"code\":\"E0381\"}},\"source\":\"rustc\"}]},\"range\":{\"start\":{\"line\":16,\"character\":24},\"end\":{\"line\":16,\"character\":24}}}",
      <metatable> = {
        __tostring = <function 1>
      }
    }
  } }

src/main.rs

mod fuzzy;

fn main() {
    let x = "kitten";
    let y= "sitting";
    println!(
        "The levensheit distance between {} and {} is {}",
        x,
        y,
        fuzzy::levenshtein_distance_recursive(String::from("kitten"), String::from("sitting"))
    );
}

src/fuzzy.rs

// https://en.wikipedia.org/wiki/Levenshtein_distance
pub fn levenshtein_distance_recursive(a: String, b: String) -> u32 {
    if a.is_empty() {
        return b.len().try_into().unwrap();
    } else if b.is_empty() {
        return a.len().try_into().unwrap();
    }
    if a[0..1] == b[0..1] {
        return levenshtein_distance_recursive(a[1..].to_string(), b[1..].to_string());
    }
    // let options: Vec<u32> = vec![
    //     levenshtein_distance_recursive(a[1..].to_string(), b.clone()),
    //     levenshtein_distance_recursive(a.clone(), b[1..].to_string()),
    //     levenshtein_distance_recursive(a[1..].to_string(), b[1..].to_string()),
    // ];
    let options: Vec<u32>;
    let smallest = options.iter().min(); // cursor is on this line on `options`
    match smallest {
        None => {
            panic!("Some error occured")
        }
        Some(i) => 1 + *i,
    }
}