[New-bugs-announce] [issue46866] bytes class extension with slices

[Sec]

New submission from Sec <sec at 42.org>:

When trying to extend the builtin bytes class, slices fall back to the builtin class.

```
class my_bytes(bytes):
  def dummy(self):
    print("dummy called")


x=my_bytes.fromhex("c0de c0de")
print(x.__class__)

print(x[1:].__class__)

```

x.__class__ returns <class '__main__.my_bytes'> as expected.

But x[1:].__class__ returns <class 'bytes'>

----------
components: Interpreter Core
files: bytes_test.py
messages: 414092
nosy: Sec42
priority: normal
severity: normal
status: open
title: bytes class extension with slices
type: behavior
versions: Python 3.9
Added file: https://bugs.python.org/file50646/bytes_test.py

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue46866>
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