In the vast majority of programs, errors and non-results are irrelevant at the call site. You want to program for the happy path and not wrap every single call with error checking code or `try/catch/finally`.

    h = file_open(path)
    data = file_read(h)
    file_close(h)
    return data

is the code you want to read. This essentially is:

    return file_open(path).success(h -> h, file_read(h)).success(h, data -> file_close(h); data)

A language with thoughtful error handling primitives will support such code.