Issue #18065: For frozen packages set __path__ to [].

Previously __path__ was set to [__name__], but that could lead to bad
results if someone managed to circumvent the frozen importer and
somehow ended up with a finder that thought __name__ was a legit
directory/location.

1 files changed, 7 insertions, 0 deletions

diff --git a/Doc/whatsnew/3.4.rst b/Doc/whatsnew/3.4.rst
index a659fc0..468ba1f 100644
--- a/Doc/whatsnew/3.4.rst
+++ b/Doc/whatsnew/3.4.rst
@@ -259,3 +259,10 @@ that may require changes to your code.
   ``__package__`` unconditionally to properly support reloading. If this is not
   desired then you will need to set these attributes manually. You can use
   :func:`importlib.util.module_to_load` for module management.
+
+* Import now resets relevant attributes (e.g. ``__name__``, ``__loader__``,
+  ``__package__``, ``__file__``, ``__cached__``) unconditionally when reloading.
+
+* Frozen packages no longer set ``__path__`` to a list containg the package name
+  but an empty list instead. Determing if a module is a package should be done
+  using ``hasattr(module, '__path__')``.