[issue29602] complex() on object with __complex__ function loses sign of zero imaginary part

[Mark Dickinson]

Mark Dickinson added the comment:

Confirmed on my machine. The effect of the source is to do `complex(complex(x), 0.0)` in this case, which isn't correct.

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components: +Interpreter Core
stage:  -> needs patch
versions: +Python 3.5, Python 3.7

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue29602>
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