Function look_after_sealed 

fn look_after_sealed(
    sharing: &Sharing<'_>,
    stores: &[Store],
    memory: &mut Memory,
    found: &Found,
    hurried: &dyn Fn() -> bool,
    problems: &mut Vec<String>,
    now_ms: i64,
)

The sealed files this computer’s records point to, looked for now and then: one gone from the folder (taken out by hand, by another device that sealed it long ago and swept it, by the server) or not of the size it was sealed at (cut, damaged on the way) is sealed again from the file here, while the file still holds that content.