Expected behavior of a Streams.cycled() instance - found issues and questions

Paul Sandoz paul.sandoz at oracle.com
Tue Oct 23 12:17:42 PDT 2012

On Oct 23, 2012, at 7:11 PM, Brian Goetz <brian.goetz at Oracle.COM> wrote:
>>   5) cycledStream.uniqueElements() leads to IllegalStateException though
>> it should not according to common sense.

Got a stack trace?

> Well, I'm not sure I agree with the notion of common sense here; I think 
> its a bit much to ask the runtime to do this kind of analysis.  But this 
> is a fine example of the sort of trouble we get in when we do try and 
> protect the user from themselves; this ISE is exactly what you're asking 
> for in (1), and we should probably remove it.

Yeah, we can only catch some not all cases so it is inconsistent.

However, for the above case I am wondering where the exception is thrown because it does not seem to match the places in AbstractPipeline an ISE is currently thrown.


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