Trace 0:
  Transitions:
    'PyWeakref_GetObject() fails due to NULL argument'
    'returning'
  Return value:
    repr(): ConcreteValue(gcctype='struct PyObject *', loc=gcc.Location(file='tests/cpychecker/refcounts/PyWeakref_GetObject/NULL/input.c', line=29), value=0)
    str(): (struct PyObject *)0 from tests/cpychecker/refcounts/PyWeakref_GetObject/NULL/input.c:29
  Exception:
    (struct PyObject *)&RegionForGlobal(gcc.VarDecl('PyExc_SystemError')) from tests/cpychecker/refcounts/PyWeakref_GetObject/NULL/input.c:29