Fix E0595: Closures Cannot Capture Structs with Borrow Checker Restrictions

Fri, 29 May 2026 17:32:04 +0800

1. Symptoms

When attempting to use a closure that captures a struct containing non-'static references, the Rust compiler produces error E0595 with a message indicating that closures cannot capture structs with borrow checker restrictions.

Common scenarios where this error manifests:

Scenario 1: Struct with self-referential lifetime field

struct Config<'a> {
    name: String,
    reference: &'a str,
}

fn main() {
    let config = Config {
        name: String::from("app"),
        reference: "value",
    };
    
    let closure = || {
        println!("{}", config.reference);
    };
    
    closure();
}
---

The compiler reports:

error[E0595]: closures cannot capture structs with borrow checker restrictions –> src/main.rs:10:17 | 10 | let closure = || { | —–^^^^^ | = note: closure may only be used as or returned from the closure’s environment, so it cannot be stored in a struct or returned from a function

E0595 on ErrorVault — Developer Error Code Dictionary

Fix E0595: Closures Cannot Capture Structs with Borrow Checker Restrictions

1. Symptoms

Scenario 1: Struct with self-referential lifetime field