[New-bugs-announce] [issue34082] EnumMeta.__new__ should use enum_class.__new__

[Pav]

New submission from Pav <rootsumsquared at gmail.com>:

```python
class Foo:
    pass

class Works(str, Foo, Enum):
    BAR = 'baz'

class Fails(Foo, str, Enum):
    BAR = 'baz'

```

`Fails` fails to be created with an error:

`TypeError: object.__new__(Fails) is not safe, use Fails.__new__()`

See https://github.com/python/cpython/blob/e57f91a0f0d5700ec466c9dd0fd2d2b5323a5e76/Lib/enum.py#L205

----------
components: Library (Lib)
messages: 321370
nosy: rs2
priority: normal
severity: normal
status: open
title: EnumMeta.__new__ should use enum_class.__new__
type: behavior
versions: Python 3.5, Python 3.6

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue34082>
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