[issue18408] Fixes crashes found by pyfailmalloc

[Roundup Robot]

Roundup Robot added the comment:

New changeset 111c2a070f28 by Victor Stinner in branch 'default':
Issue #18408: PyObject_GC_NewVar() now raises SystemError exception if nitems
http://hg.python.org/cpython/rev/111c2a070f28

New changeset ba766323b53a by Victor Stinner in branch 'default':
Issue #18408: Fix PyDict_New() to handle correctly new_keys_object() failure
http://hg.python.org/cpython/rev/ba766323b53a

New changeset 68887e177dd4 by Victor Stinner in branch 'default':
Issue #18408: Fix list.pop() to handle list_resize() failure (MemoryError).
http://hg.python.org/cpython/rev/68887e177dd4

New changeset 697d722d97f9 by Victor Stinner in branch 'default':
Issue #18408: Fix marshal reader for Unicode strings: handle
http://hg.python.org/cpython/rev/697d722d97f9

New changeset de1473f4503b by Victor Stinner in branch 'default':
Issue #18408: Fix PyType_Ready() and type.__bases__ setter to handle
http://hg.python.org/cpython/rev/de1473f4503b

New changeset f4311870e329 by Victor Stinner in branch 'default':
Issue #18408: Fix call_function() of ceval.c to handle PyTuple_New() failure
http://hg.python.org/cpython/rev/f4311870e329

New changeset df8b40593a08 by Victor Stinner in branch 'default':
Issue #18408: Fix _PyUnicodeWriter_Finish(): clear writer->buffer,
http://hg.python.org/cpython/rev/df8b40593a08

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nosy: +python-dev

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