rand.mt19937: relax data for -autofree, update test#26266
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Thank you @tankf33der 🙇🏻 .
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Fixes #13398
When operating in
-autofreemode, memory errors that should not occur are detected.Other generators are not affected by this.
rng.state = calculate_state(seed_data, mut rng.state)- if one is already being modified, then there's no need to return it.mut rnd := &rand.PRNG(&mt19937.MT19937RNG{})- the usage principle is copied from another generator's test