[issue36907] Crash due to borrowed references in _PyStack_UnpackDict()

[Jeroen Demeyer]

Jeroen Demeyer <J.Demeyer at UGent.be> added the comment:

The idea of #36904 could be used here: define a special kind of tuple, which is like an ordinary tuple followed by a C array of PyObject* entries (all refcounted), terminated by a NULL to know where it ends. A special deallocation function would decref all entries.

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<https://bugs.python.org/issue36907>
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