Fix NotFoundError in Rust

Rust Not Found Errors

Rust's file not found for module and unresolved import errors are compile-time issues. At runtime, std::io::ErrorKind::NotFound appears when files or resources are missing.

Module Not Found

// Error: file not found for module `utils`
// Rust expects either:
// src/utils.rs
// OR
// src/utils/mod.rs

// In main.rs or lib.rs:
mod utils;  // Looks for src/utils.rs or src/utils/mod.rs

// For nested modules:
mod models {
    mod user;  // Looks for src/models/user.rs
}

Unresolved Import

// Error: unresolved import `serde`
// Fix: add to Cargo.toml
// [dependencies]
// serde = { version = "1.0", features = ["derive"] }

use serde::{Serialize, Deserialize};

#[derive(Serialize, Deserialize)]
struct User {
    name: String,
}

Runtime File Not Found

use std::path::PathBuf;

// BAD — relative path depends on working directory
let config = std::fs::read_to_string("config.toml")?;

// GOOD — relative to the executable
let exe_dir = std::env::current_exe()?
    .parent()
    .unwrap()
    .to_path_buf();
let config_path = exe_dir.join("config.toml");
let config = std::fs::read_to_string(&config_path)
    .map_err(|e| format!("Failed to read {}: {}", config_path.display(), e))?;

Include at Compile Time

For small files, embed them in the binary:

const CONFIG: &str = include_str!("../config.toml");
const LOGO: &[u8] = include_bytes!("../assets/logo.png");

Bugsly captures Rust panics and error results with full backtraces, including io::Error with the file path that caused the failure.