C++ : Why new[-1] generates segfault, while new[-2] throws bad_alloc?

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C++ : Why new[-1] generates segfault, while new[-2] throws bad_alloc?
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C++ : Why new[-1] generates segfault, while new[-2] throws bad_alloc?
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throws Why C++ segfault, while new[-2] : bad_alloc? new[-1] generates



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