[issue42936] Decimal module performs wrong floor division with negative numbers

[Mark Dickinson]

Mark Dickinson <dickinsm at gmail.com> added the comment:

The behaviour is deliberate, if unfortunate: it's covered in the documentation here: https://docs.python.org/3/library/decimal.html#decimal-objects - see the paragraph starting

> There are some small differences between arithmetic on Decimal objects
> and arithmetic on integers and floats. When the remainder operator % is
> applied to Decimal objects

The issue is that the decimal spec specifies "divide-integer" and "remainder" operations. We've chosen to map those operations to "%" and "//" for convenience, even though there's a difference between float and Decimal here.

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nosy: +mark.dickinson

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<https://bugs.python.org/issue42936>
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