What am I doing wrong?

[smoelius]

My understanding is that cargo-libafl is supposed to behave like cargo-fuzz, but I am having trouble getting it to do so.

I am trying to fuzz this function using carg-libafl:

pub fn target(n: usize) {
    let vec = Vec::<u8>::with_capacity(n);
    println!("{:p}", &vec);
}

You can see the steps I performed and the resulting repo here.

When I run cargo +nightly libafl run fuzz_target_1, I see the status screen, but it appears to hang (executions never gets above 1). Also, moving the mouse around causes junk characters to be written to the terminal.

When I perform analogous steps using cargo-fuzz, it finds a crash right away.

Any idea what I might be doing wrong?