create zip file failed with append mode

[KveinAxel]

use std::fs::OpenOptions;

fn main() {
    let mut zip = zip::ZipWriter::new(
        OpenOptions::new()
            .append(true)
            .create(true)
            .open("test.zip")
            .unwrap(),
    );

    let options =
        zip::write::FileOptions::default().compression_method(zip::CompressionMethod::Stored);
    zip.start_file("hello_world.txt", options).unwrap();

    zip.finish().unwrap();
}

as title, if we create a zip with append mode, it will fail to be unzip

it seems like some zero bytes were not cleared.

I'm sure the file is new created, not run multile times.

[a1phyr]

I am pretty sure the append(true) on the file is the culprit here. Can you try without ?

[Pr0methean]

Try changing it to write(true); that'll be more convenient to test since it will overwrite any previous version.