[issue25782] CPython hangs on error __context__ set to the error itself

[Yury Selivanov]

Yury Selivanov added the comment:

> Yury's raises a RuntimeError in the loop situation.

> Serhiy's simply reorders the exception context to put the referred to one at the front of the chain in the event of a loop.

Right, and I believe that my solution is more Pythonic.  Reordering feels highly unintuitive to me.

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<http://bugs.python.org/issue25782>
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