[issue31406] crashes when comparing between a Decimal object and a bad Rational object

[Stefan Krah]

Stefan Krah added the comment:


New changeset f8909d0e4b652256e4da153fa6be664490f60a07 by Stefan Krah (Miss Islington (bot)) in branch '3.6':
[3.6] bpo-31406: Fix crash due to lack of type checking in subclassing. (GH-3477) (#3479)
https://github.com/python/cpython/commit/f8909d0e4b652256e4da153fa6be664490f60a07


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<https://bugs.python.org/issue31406>
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