$ cat >ruf036_1.py <<'# EOF'
class C:
    def __or__(self, other): return False
    def __ror__(self, other): return True
print(None | C())

from typing import Literal
class M(type):
    def __or__(self, other): return Literal[False]
    def __ror__(self, other): return Literal[True]
class C(metaclass=M): pass
x: None | C
print(__annotate__(1)["x"])
# EOF

$ python3.14 ruf036_1.py
True
typing.Literal[True]

$ ruff --isolated check --select RUF036 --preview ruf036_1.py --fix
Found 2 errors (2 fixed, 0 remaining).

$ python3.14 ruf036_1.py
False
typing.Literal[False]

$ cat >ruf036_2.py <<'# EOF'
print(None | (int)and 2)
print(2 or(None) | int)
# EOF

$ python ruf036_2.py
2
2

$ ruff --isolated check --select RUF036 --preview ruf036_2.py --fix

error: Fix introduced a syntax error. Reverting all changes.

This indicates a bug in Ruff. If you could open an issue at:

    https://github.com/astral-sh/ruff/issues/new?title=%5BFix%20error%5D

...quoting the contents of `ruf036_2.py`, the rule codes RUF036, along with the `pyproject.toml` settings and executed command, we'd be very appreciative!

RUF036 `None` not at the end of the type union.
 --> ruf036_2.py:1:7
  |
1 | print(None | (int)and 2)
  |       ^^^^^^^^^^^^
2 | print(2 or(None) | int)
  |
help: Move `None` to the end of the type union
  - print(None | (int)and 2)
1 + print(int | Noneand 2)
2 | print(2 or(None) | int)

RUF036 `None` not at the end of the type union.
 --> ruf036_2.py:2:11
  |
1 | print(None | (int)and 2)
2 | print(2 or(None) | int)
  |           ^^^^^^^^^^^^
  |
help: Move `None` to the end of the type union
1 | print(None | (int)and 2)
  - print(2 or(None) | int)
2 + print(2 orint | None)

Found 2 errors.
[*] 2 fixable with the `--fix` option.