Rust errors look messy

[flip111]

On this kata https://www.codewars.com/kata/square-n-sum/train/rust

with this code

fn square_sum(vec: Vec<i32>) -> i32 {
  let total = 0
  for n in vec {
    total += n.pow(2)
  }
}

i get this error

errorerror: expected one of `.`, `;`, `?`, or an operator, found `for`: expected one of `.`, `;`, `?`, or an operator, found `for`
 
-->  src/lib.rs:3:3
-->   src/lib.rs:3:3|

  2| 
|   let total = 02
   | |                  let total = 0-
 expected one of `.`, `;`, `?`, or an operator here  
| 3                -|    for n in vec {
expected one of `.`, `;`, `?`, or an operator here  
| 3  ^^^  | unexpected token  for n in vec {

  
|   ^^^ unexpected token

error: aborting due to previous error


warning: build failed, waiting for other jobs to finish...
error: aborting due to previous error

error: Could not compile `qualified-rust`.


NOTE: Line numbers in error messages can be incorrect due to concatenation.

in the first part of this error message there is a lot of duplicate stuff .. this can't be right

[kazk]

Thanks for reporting.
Looks like cargo test is compiling it twice in parallel (rust-lang/cargo#851).
I'll look into how to prevent this.

[kazk]

I'll try adding doctest = false in Cargo.toml.

[kazk]

Fixed this by using cargo test --lib. I'll deploy the change maybe tomorrow.

[kazk]

The fix is deployed.