gh-157242: Fix set_nomemory() on Py_TRACE_REFS build - #157351
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On Py_TRACE_REFS build, use malloc() and free() functions of the C library for the "reference chain" hash table. So it becomes possible to use _testcapi.set_nomemory() with Py_TRACE_REFS. Mark new tests using set_nomemory() with @support.nomemtest.
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…7351) On Py_TRACE_REFS build, use malloc() and free() functions of the C library for the "reference chain" hash table. So it becomes possible to use _testcapi.set_nomemory() with Py_TRACE_REFS. Mark new tests using set_nomemory() with @support.nomemtest.
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On Py_TRACE_REFS build, use malloc() and free() functions of the C library for the "reference chain" hash table. So it becomes possible to use
_testcapi.set_nomemory()with Py_TRACE_REFS.Mark new tests using set_nomemory() with
@support.nomemtest.