You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: main_thread.rs
    path of file: ./repos/c2rust/c2rust-refactor/src/interact
    
    the code of the file until where you have to start completion: //! The main thread for interactive mode.
//!
//! The main thread runs a loop receiving and processing client requests.
use rustc_interface::interface::{self, Config};
use std::collections::{HashMap, HashSet};
use std::fs
    
    fn run_loop(&mut self, main_recv: Receiver<ToServer>) {
        for msg in main_recv.iter() {
            let result = panic::catch_unwind(AssertUnwindSafe(|| {
                self.handle_one(msg);
            }));

            if let Err(e) = result {
                let text = if let Some(s) = e.downcast_ref::<String>() {
                    s.clone()
                } else {
                    "An error occurred of unknown type".to_owned()
                };
                self.to_client.send(ToClient::Error { text }).unwrap();
            }
        }
    }