Alexandre Vassalotti <alexan...@peadrop.com> added the comment:

Not a bug.

The list comprehension in your chunker:

    while True:
        target.send([ (yield) for i in range(chunk_size) ])

is equivalent to the following generator in Python 3:

    while True:
        def g():
            for i in range(chunk_size):
                yield (yield)
        target.send(list(g()))

This clearly needs not what you want. So, just rewrite your code using
for-loop:

    while True:
        result = []
        for i in range(chunk_size):
            result.append((yield))
        target.send(result)

----------
nosy: +alexandre.vassalotti
resolution:  -> invalid
status: open -> closed

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue6673>
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