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With the sort comparator as <=, strict weak ordering is not maintained, i.e. (x, y) and (y, x) can both be present in the relation. In some instances, the result is a seg fault. Changing the comparator to < fixes this.
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With the sort comparator as <=, strict weak ordering is not maintained, i.e. (x, y) and (y, x) can both be present in the relation. In some instances, the result is a seg fault. Changing the comparator to < fixes this.