Original patch by Julien Courteau and Pierre Paul Lefebvre.

Issue #16602: When a weakref's target was part of a long deallocation chain, the object could remain reachable through its weakref even though its refcount had dropped to zero.

Thanks to Eugene Toder for diagnosing and reporting the issue.

Issue #16602: When a weakref's target was part of a long deallocation chain, the object could remain reachable through its weakref even though its refcount had dropped to zero.

Thanks to Eugene Toder for diagnosing and reporting the issue.

Issue #16602: When a weakref's target was part of a long deallocation chain, the object could remain reachable through its weakref even though its refcount had dropped to zero.

Thanks to Eugene Toder for diagnosing and reporting the issue.

There was a window between the write and the chmod where the user’s
password would be exposed, depending on default permissions.  Philip
Jenvey’s patch fixes it.

These files are created by some NFS clients a file is edited and removed
concurrently (see added link in doc for more info).  If such a file is
removed between distutils calls listdir and copy, it will get confused.
Other special files are ignored in sdist (namely VCS directories), but
this has to be filtered out earlier.

Patch by Steven Kryskalla.

Patch by Steven Kryskalla.

Patch by Steven Kryskalla.

- not allowed when implicitly re-raised the current exception
- last exception raised is always displayed last
- attempt to make it clearer when/if cause and context are shown

add fixer for reload() -> imp.reload() (closes #11797)\n\nPatch by Laurie Clark-Michalek and Berker Peksag

The NULL encoding check in bytes_decode() was unnecessary because this case
is already taken care of by the call to _Py_normalize_encoding() inside
PyUnicode_Decode().

Update comment: SAVE_EXC_STATE and SWAP_EXC_STATE macroses are saave_exc_state and swap_exc_state functions now.

Update comment: SAVE_EXC_STATE and SWAP_EXC_STATE macroses are saave_exc_state and swap_exc_state functions now.