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

[Guido van Rossum]

Guido van Rossum added the comment:

> But leaving the old __context__ there will completely mask the bug...
OK, NULL is fine then.

>we better raise a TypeError if a cycle is about to be introduced?
Yes.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue25782>
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