Why do I get the error "Packages cannot be nested"?

I had a FLA file that somehow had the AS3 erased, then I found the SWF and decompiled the file and retrieved the code.
It is the same code as before, and yet when I output it I get the error “Packages cannot be nested”.

I have seen them nested before, and the Adobe site says you can do this.

What can I do?

Packages can’t be nested… The error message doesn’t refer to com.example.foo being nested within com.example. It means that you can’t have code like:

package com {
     package example {

    }
}

This also applies to timeline/frame scripts, because they’re implicitly wrapped into a class and package.

Really? What’d it look like in code? And where does Adobe’s site say it?