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gh-113939: Frame clear, clear locals (#113940)
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@ -55,6 +55,28 @@ class C:
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# The reference was released by .clear()
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self.assertIs(None, wr())
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def test_clear_locals_after_f_locals_access(self):
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# see gh-113939
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class C:
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pass
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wr = None
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def inner():
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nonlocal wr
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c = C()
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wr = weakref.ref(c)
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1/0
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try:
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inner()
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except ZeroDivisionError as exc:
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support.gc_collect()
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self.assertIsNotNone(wr())
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print(exc.__traceback__.tb_next.tb_frame.f_locals)
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exc.__traceback__.tb_next.tb_frame.clear()
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support.gc_collect()
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self.assertIsNone(wr())
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def test_clear_does_not_clear_specials(self):
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class C:
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pass
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@ -0,0 +1,4 @@
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frame.clear():
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Clear frame.f_locals as well, and not only the fast locals.
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This is relevant once frame.f_locals was accessed,
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which would contain also references to all the locals.
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@ -926,6 +926,7 @@ frame_tp_clear(PyFrameObject *f)
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Py_CLEAR(locals[i]);
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}
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f->f_frame->stacktop = 0;
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Py_CLEAR(f->f_frame->f_locals);
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return 0;
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}
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