On 21 Apr 2014, at 18:55, Chris Cooper wrote:

The test_main() of libs/utility/operators_test.cpp loops 1000 times, running a variety of tests on random values. However, since the randomizer (boost::minstd_rand) is instantiated inside the loop, it appears that the randomizer is re-seeded for each loop, meaning it runs the test 1000x with the exact same values each time.

I’m not 100% familiar with the boost random value generators, am I missing something? Or should the boost::minstd_rand be instantiated outside the loop?

I’m happy to add this as a boost bug if my understanding is correct …

Thanks, Chris

Yes you need to put it outside the loop. When the random object is created it’s set to the same default seed.