snoyberg/conduit — comment on commit 5c12b11d691b40aa6366ab5c9d41db94526f640a
File: Data/Conduit/List.hs line 96
By snoyberg:

For most sinks that's true. But perhaps some special sinks (e.g., a Socket sink) would check if the socket is still open, and if not, do something else. I don't think we can give any clear laws on this, as it depends entirely on the underlying content.