Description
When attempting to run the very simple program in release mode below. I get the following error:
error: failed to run custom build command for `libc v0.2.161
use std::env;
use std::io::Write;
fn get_hostname() -> String {
let mut hostname_buffer: [u8; 256] = [0; 256];
unsafe {
libc::gethostname(
hostname_buffer.as_mut_ptr() as *mut i8,
hostname_buffer.len(),
)
};
String::from_utf8(hostname_buffer.to_vec()).unwrap()
}
fn main() {
let mut input_string = String::with_capacity(1024);
let computer_username = env!("USER");
let computer_name = get_hostname();
let (actual_name, _) = computer_name.split_once(".").unwrap();
loop {
print!("{computer_username}@{actual_name} > ");
std::io::stdout().flush().unwrap();
std::io::stdin().read_line(&mut input_string).unwrap();
// removes new line character
input_string.pop();
println!("{input_string}");
input_string.clear();
}
}When omitting libc from the dependency and run it just using the standard library I get the process being killed upon running in release mode:
zsh: killed cargo run --release
use std::env;
use std::io::Write;
//fn get_hostname() -> String {
// let mut hostname_buffer: [u8; 256] = [0; 256];
// unsafe {
// libc::gethostname(
// hostname_buffer.as_mut_ptr() as *mut i8,
// hostname_buffer.len(),
// )
// };
// String::from_utf8(hostname_buffer.to_vec()).unwrap()
//}
fn main() {
let mut input_string = String::with_capacity(1024);
let computer_username = env!("USER");
//let computer_name = get_hostname();
let (actual_name, _) = computer_name.split_once(".").unwrap();
loop {
//print!("{computer_username}@{actual_name} > ");
std::io::stdout().flush().unwrap();
std::io::stdin().read_line(&mut input_string).unwrap();
// removes new line character
input_string.pop();
println!("{input_string}");
input_string.clear();
}
}Note that both these programs work as intented in debug mode and even on release mode in nightly (tested on 2024-10-07).
Finally as a last example I'm getting a killed process from this program in release mode as well:
use std::collections::{BTreeMap, BTreeSet};
#[derive(Debug)]
struct Graph {
pub adjacency_list: BTreeMap<char, BTreeSet<char>>,
}
impl Graph {
pub fn new() -> Self {
Self {
adjacency_list: BTreeMap::new(),
}
}
pub fn add_edge(&mut self, a: char, b: char) {
self.adjacency_list
.entry(a)
.or_insert(BTreeSet::new())
.insert(b);
self.adjacency_list
.entry(b)
.or_insert(BTreeSet::new())
.insert(a);
}
}
fn main() {
let mut graph = Graph::new();
graph.add_edge('A', 'B');
graph.add_edge('C', 'D');
graph.add_edge('A', 'E');
graph.add_edge('A', 'F');
println!("{graph:?}");
}This is occurring on rustc stable version 1.82 and also on the previous 1.81 version. I am using a base 16 inch m2 macbook pro running on MacOS Sequoia 15.0.1. I have tried reproducing the bug on my linux machine but the process being killed only occurs on my mac.