Clashing types, crossterm::Result and core::Result error[E0107]: - rust

Question

I know the issue is that I have two Result types from different libraries but can't find how to fix it.
[dependencies]
crossterm = "0.23"
time = "0.3.9"
tokio = { version = "1", features = ["full"] }
reqwest = { version = "0.11", features = ["blocking", "json"] }
use time::Instant;
use std::collections::HashMap;
use crossterm::{
event::{self, Event, KeyCode, KeyEvent},
Result,
};
pub fn read_char() -> Result<char> {
loop {
if let Event::Key(KeyEvent {
code: KeyCode::Char(c),
..
}) = event::read()?
{
return Ok(c);
}
}
}
fn main() -> Result<(), Box<dyn std::error::Error>> {
let instant = Instant::now();
let response = reqwest::blocking::get("https://httpbin.org/ip")?
.json::<HashMap<String, String>>()?;
let duration = instant.elapsed();
println!("ns = {:?}, response: {:#?}, ", duration.whole_nanoseconds(), response);
// Any key to continue
println!("Press any key to continue:");
println!("{:?}", read_char());
Ok(())
}
Gives the error:
error[E0107]: this type alias takes 1 generic argument but 2 generic arguments were supplied
--> src\main.rs:20:14
|
20 | fn main() -> Result<(), Box<dyn std::error::Error>> {
| ^^^^^^ -------------------------- help: remove this generic argument
| |
| expected 1 generic argument
How do I fix this? I have searched but am likely looking for incorrect terms e.g. namespace alias and core::Result error[E0107] is not really helping.
I have tried this without success:
fn main() -> core::Result<(), Box<dyn std::error::Error>> {

Answer 1

You have crossterm ::Result in scope, so you would have to disambiguate the result you want to return, otherwise it just thinks you want to return the crossterm type:
fn main() -> std::result::Result<(), Box<dyn std::error::Error>> {
...
Ok(())
}