Accidentally swapping bytesToLines and linesToBytes produces terrible error message

[Julian]

If you do the above, which I assume everyone will do at one point or another, you get the horrid:

Traceback (most recent call last):
  File "/home/julian/.local/share/virtualenvs/pkg/site-packages/click/core.py", line 535, in invoke
    return callback(*args, **kwargs)
  File "/home/julian/Development/pkg/pkg/_cli.py", line 33, in crawl
    react(_crawl, [endpoint])
  File "/home/julian/.local/share/virtualenvs/pkg/site-packages/twisted/internet/task.py", line 908, in react
    finished = main(_reactor, *argv)
  File "/home/julian/.local/share/virtualenvs/pkg/site-packages/twisted/internet/defer.py", line 1532, in unwindGenerator
    return _inlineCallbacks(None, gen, Deferred())
--- <exception caught here> ---
  File "/home/julian/.local/share/virtualenvs/pkg/site-packages/twisted/internet/defer.py", line 1386, in _inlineCallbacks
    result = g.send(result)
  File "/home/julian/Development/pkg/pkg/_cli.py", line 40, in _crawl
    fount.flowTo(Listener(crawlerFlow))
  File "/home/julian/.local/share/virtualenvs/pkg/site-packages/tubes/protocol.py", line 353, in flowTo
    self._aFlowFunction(f, d)
  File "/home/julian/.local/share/virtualenvs/pkg/site-packages/tubes/protocol.py", line 411, in aFlowFunction
    listening.impl.drain.receive(Flow(fount, drain))
  File "/home/julian/.local/share/virtualenvs/pkg/site-packages/tubes/listening.py", line 93, in receive
    item.drain))
  File "/home/julian/Development/pkg/pkg/_cli.py", line 53, in crawlerFlow
    flow.fount.flowTo(crawler).flowTo(flow.drain)
  File "/home/julian/.local/share/virtualenvs/pkg/site-packages/tubes/_siphon.py", line 215, in flowTo
    result = beginFlowingTo(self, drain)
  File "/home/julian/.local/share/virtualenvs/pkg/site-packages/tubes/kit.py", line 104, in beginFlowingTo
    return drain.flowingFrom(fount)
  File "/home/julian/.local/share/virtualenvs/pkg/site-packages/tubes/protocol.py", line 107, in flowingFrom
    beginFlowingFrom(self, fount)
  File "/home/julian/.local/share/virtualenvs/pkg/site-packages/tubes/kit.py", line 128, in beginFlowingFrom
    fount=fount, drain=drain))
exceptions.TypeError: the output of <Fount for <tubes.framing._CarriageReturnRemover object at 0x0000000001a24e90>>, <InterfaceClass tubes.itube.IFrame>, is not compatible with the required input type of <tubes.protocol._TransportDrain object at 0x0000000001a24ec8>, <InterfaceClass tubes.itube.ISegment>

which is pretty hard to decypher.

[glyph]

Improved debuggability is great! How would you suggest this output look better?