Im losing it please help

help
1

Heres the code :

    fn enable_raw_mode() -> R<()> {
    let mut o_ts_guard = O_TS.lock()?;
    let o_ts = &mut *o_ts_guard;

    let ret = unsafe { ioctl(0, TCGETS, o_ts) };
    if ret == -1 {
        return Err("syscall failed".into());
    }
// stuck now..
    Ok(())
}

i get the following error message:

 cannot return value referencing temporary value
   returns a value referencing data owned by the current function [E0515]

i have been banging my head cause i really do not know the issue please help me thank you

2

Hi. Many people here will be glad to help you, but we can't do much with the information you provided us. Please try providing a minimal reproducible example (sharing it on Rust playground would be best). Without knowing what the types are - what is R<()> for example? - it is impossible to determine what is the root cause of your problem. Also error message should point faulty expression (and provide a hint to where this temporary is created), but you removed it. Reading your example now I don't see any return paths, that return borrowed data.

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3

ok the solution is so dumb that its pretty Embarrassing.the problem was i called the global var as const ... instead of static..
and also fyi
R<()> is

type R<T> = Result<T, Box<dyn Error>>;
1 Like