diff options
Diffstat (limited to 'Lib/typing.py')
| -rw-r--r-- | Lib/typing.py | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Lib/typing.py b/Lib/typing.py index 24f834e..5873d53 100644 --- a/Lib/typing.py +++ b/Lib/typing.py @@ -1404,6 +1404,11 @@ def _no_init_or_replace_init(self, *args, **kwargs): if cls._is_protocol: raise TypeError('Protocols cannot be instantiated') + # Already using a custom `__init__`. No need to calculate correct + # `__init__` to call. This can lead to RecursionError. See bpo-45121. + if cls.__init__ is not _no_init_or_replace_init: + return + # Initially, `__init__` of a protocol subclass is set to `_no_init_or_replace_init`. # The first instantiation of the subclass will call `_no_init_or_replace_init` which # searches for a proper new `__init__` in the MRO. The new `__init__` |