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19 lines
524 B
C
19 lines
524 B
C
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#include <stdlib.h>
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int main(void)
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{
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// When I had n-u --> u, this gave a false positive... can happen because
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// p+up can give n if you are (un)lucky, because the result is close enough
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// to zero.
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int u[20];
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int* p = malloc(sizeof(int) * 100);
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p[0] = 0; // ok
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int* n = (int*)((long)p + (long)u); // result is n, because near zero!
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int* x = (int*)((long)n - (long)u); // x == p
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x[0] = 0; // ok, originally caused false pos.
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return 0;
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}
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