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[1.12 regression] False positive when iterating over union #17945
Description
import itertools
def foo(arg: int | None):
it = itertools.count() if arg is None else range(arg)
for i in it:
print(i)
Now gives:
test40.py:5: error: Item "range" of "range | Iterator[int]" has no attribute "__next__" [union-attr]
The proximal cause is probably the switch away from unions in ternary
Activity
[-][1.12 regression][/-][+][1.12 regression] False positive when iterating over union[/+]fix
Fix iteration over union (when self type is involved) (#17976)
Fix iteration over union (when self type is involved) (python#17976)