Mismatched Types

[JointKush]

Whenever I try to run my script I always get this error:

I'm not sure why i'm running into. I swore this issue was fixed prior in a later version.

code:

use mongodb::bson::{
    self,
    doc,
    Bson
  };
  use tokio;
  
  #[tokio::main]
  async fn main() {
    
    let client = mongodb::Client::with_uri_str("mongodb://localhost:27017").await ? ;
    println!("Databases:");

    for name in client.list_database_names(None, None).await ? {
      println!("- {}", name);
    }
    Ok(())
  }

cargo.toml
tokio = { version = "1.2.0", features = ["full"] }
My version:

[memoryruins]

async fn main() {

currently the return type is implicitly the unit type -> (). It's suggesting a semicolon because adding that after Ok(()) would cause the expression to return (), though not exactly what you seem to want (and the error is confusing because it's underlining the tokio::main macro and not the expression).

Since you are trying to return a result and use ?, you likely meant to make the function's signature something like async fn main() -> Result<(), Box<dyn std::error::Error>>

[JointKush]

I don't why I forgot all about that. Thanks that helped

[Darksonn]

When the macro gives this kind of poor error message, you can remove the macro, and the error message should improve.