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// Check that mallopt does not return invalid values (ex. -1).
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// RUN: %clangxx -O2 %s -o %t && %run %t
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#include <assert.h>
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#include <malloc.h>
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int main() {
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// Try a random mallopt option, possibly invalid.
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int res = mallopt(-42, 0);
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assert(res == 0 || res == 1);
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}
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