Unexpected behaviour for generator expressions in python 3.7 #5371
Description
When running the following example with pytest 4.6.1 with python 3.6 from conda, the test passes, however when running with the same pytest version with python 3.7 the second assert statement fails
def test_example():
assert all(list(x for x in [True, False] if x))
assert all(x for x in [True, False] if x) def test_example():
assert all(list(x for x in [True, False] if x))
> assert all(x for x in [True, False] if x)
E assert False
pytest_example.py:4: AssertionError
Conda requirements file:
name: pytest_test
channels:
- conda-forge
- defaults
dependencies:
- python=3.7
- pytest