Error E0277

"the trait bound is not satisfied" — How to Fix

Compiler Errors

2026-04-17T12:05:42+00:00

Fix Rust error E0277 by implementing the missing trait for your type or using a type that already satisfies the required trait bound.

Error E0277 occurs because a type does not implement a required trait, so you must either implement the trait for your type or change the code to use a type that already implements it.

use std::fmt::Display;

struct MyStruct;

impl Display for MyStruct {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(f, "MyStruct")
    }
}

fn main() {
    let s = MyStruct;
    println!("{s}");
}