snoyberg/conduit — comment on commit 02f100a17e61228da856e67f82f09d98f8072da4
File:  line 0
By snoyberg:

Imagine a call to isolate. It wants to return some output, but will not accept any more input. We don't want to force another pull from the source just to find this out. If we don't put in this information, then we'll get hangs in http-enumerator (for example) waiting for extra input that will never come.