+What's New in Python 2.2.1 final?
+Release date: XX-Apr-2002
+- Fixed two bugs reported as SF #535905: under certain conditions,
+ deallocating a deeply nested structure could cause a segfault in the
+ garbage collector, due to interaction with the "trashcan" code;
+ access to the current frame during destruction of a local variable
+ could access a pointer to freed memory.
What's New in Python 2.2.1c2?
Release date: 26-Mar-2002