File: issue-22034.rs

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#![feature(rustc_private)]

extern crate libc;

fn main() {
    let ptr: *mut () = core::ptr::null_mut();
    let _: &mut dyn Fn() = unsafe {
        &mut *(ptr as *mut dyn Fn())
        //~^ ERROR expected a `Fn()` closure, found `()`
    };
}