New semantic analyzer: plugin generated methods are confused with user defined ones #6954
Description
This test case fails with new analyzer (note deferral):
[case testDataclassOrdering]
# flags: --python-version 3.6
from dataclasses import dataclass
defer: Yes
@dataclass(order=True)
class Application:
name: str
rating: int
class Yes: ...
[builtins fixtures/list.pyi]
with a bunch of errors
main:7: error: You may not have a custom __lt__ method when order=True
main:7: error: You may not have a custom __gt__ method when order=True
main:7: error: You may not have a custom __le__ method when order=True
main:7: error: You may not have a custom __ge__ method when order=True
Setting priority to high because it is a flaw in basic plugin functionality.