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‎Misc/NEWS.d/next/Core_and_Builtins/2025-06-06-18-57-30.gh-issue-135171.0YtLq6.rst‎

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Reverts the behavior of generator expressions when created with a
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non-iterable to the pre-3.13 behavior of raising a TypeError. It is no
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longer possible to cause a crash in the debugger by altering the generator
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expression's local variables. This is achieved by moving the ``GET_ITER``
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instruction back to the creation of the generator expression and adding an
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additional check to ``FOR_ITER``.

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