You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: main.rs
    path of file: ./repos/kani/tests/expected/realloc/zero_size
    
    the code of the file until where you have to start completion: // Copyright Kani Contributors
// SPDX-License-Identifier: Apache-2.0 OR MIT

// Calling realloc with a size of z
    
fn main() {
    unsafe {
        let layout = Layout::array::<i32>(3).unwrap();
        let ptr = alloc(layout);

        *(ptr as *mut i32) = 888;
        *(ptr as *mut i32).offset(1) = 777;
        *(ptr as *mut i32).offset(2) = -432;

        let _ptr = realloc(ptr as *mut u8, layout, 0);
    }
}