Failure when trying to call __repr__ because __iter__ is called? #7966
Description
1. Problem
The following code
class A: def __iter__(self): raise ValueError() def __eq__(self, o: object) -> bool: return self is o def test_a(): assert A() == A()...will throw:
def test_a(): > assert A() == A() E assert <tests.test_p...0019C132F1490> == <tests.test_p...0019C132F12B0> E (pytest_assertion plugin: representation of details failed: XXX\test_pp.py:3: ValueError. E Probably an object has a faulty __repr__.) ...because __iter__ is called in order to repr() the object?
Is there a way to avoid __iter__ being called when a test fails?