Unsoundness: Cloning `rcublas::Context` leads to DF and possibly UAF

[t1mlange]

Describe the bug

rcublass::Context::clone() copies the pointer but the Context is also owned. Thus, the first Context frees the underlying C object and all other cloned contexts exhibit UB afterwards.

To Reproduce

fn main() -> anyhow::Result<()> {
    let _outer;
    {
        let inner = rcublas::Context::new()?;
        _outer = inner.clone();
    }

    Ok(())
}

Expected behavior

Either should not compile or be safe.

Screenshots

$ ./rcublas-repro/target/debug/rcublas-repro
free(): double free detected in tcache 2
Aborted (core dumped)

[drahnr]

Confirmed. This is an issue. Note that this project has been dormant for a loong time and your time/tokens/money might be spent better elsewhere.