bpo-29569: threading.Timer class: Continue periodical execution till action return True by slytomcat · Pull Request #121 · python/cpython

…ile clearing a thread state

If Python clears a thread state and a destructor or a weakref-callback runs Python code, Python used to create a new initial stub without clearing it later. This change reorders PyThreadState_Clear() to clear the PyStacklessState sub-structure last. A new test case for this problem uses thread local storage to execute a __del__-method.

https://bitbucket.org/stackless-dev/stackless/issues/121
(grafted from ede2ad2b32b917d364f523318a82c75d0df2a0e6)